Practice Test

Q1) Each of the following is true for white and red phosphorus except that they Show Answer

Q2) Which of the following oxides will be least acidic? Show Answer

Q3) Which of the following contains a coordinate bond ? Show Answer

Q4) Which of the following P is thermodynamical most stable ? Show Answer

Q5) Which of the following goes under sublimation? Show Answer

Q6) The structure of white phosphorus is Show Answer

Q7) The most acidic of the following compound is Show Answer

Q8) Which of the following molecule is linear ? Show Answer

Q9) Which one of the following oxides of nitrogen is blue solid ? Show Answer

Q10) What causes nitrogen to be chemically inert ? Show Answer

Q11) In which of the following the bond angle is maximum ? Show Answer

Q12) Which one of the following arrangement of molecules is correct on the basis of their dipole moments ? Show Answer

Q13) Which of the following is an oxyacid? Show Answer

Q14) Which one of the following elements is most metallic ? Show Answer

Q15) The substance used in smoke is Show Answer

Q16) The number pf P - O - P bridges in the structure of phosphorus pentoxide and phosphorus trioxide are respectively Show Answer

Q17) An example of neutral oxide is Show Answer

Q18) Phosphide ion has the electronic structure similar to that of Show Answer

Q19) Phosphine is not obtained by the reaction when Show Answer

Q20) With respect to protonic acids, which of the following statement is correct ? Show Answer

Q21) White phosphorus when boiled with strong solution of caustic soda produce Show Answer

Q22) Phosphorus pentoxide finds use as Show Answer

Q23) Which one of the following pentafluorides cannot be formed ? Show Answer

Q24) Which element from group 15 gives most basic compound with hydrogen ? Show Answer

Q25) Which of the following has least covalent P - H bond? Show Answer

Q26) The oxyacid of phosphorus in which phosphorus has the lowest oxidation state is Show Answer

Q27) The oxidation state of nitrogen is highest in Show Answer

Q28) When ammonia is heated with cupric oxide, a molecule of ammonia will Show Answer

Q29) The three important oxidation states of phosphorus are Show Answer

Q30) Nitrogen shows different oxidation states in the range. Show Answer

Q31) Which of the following is arranged in the increasing order of enthalpy of vaporization ? Show Answer

Q32) Which of the following is not correct ? Show Answer

Q33) Phosphine is prepared by the action of Show Answer

Q34) Which of the following substance is used as fertilizer ? Show Answer

Q35) The chemical formula for tartar emetic is Show Answer

Q36) Which of the following phosphorus is most reactive ? Show Answer

Q37) Which of the following species is isoelectronic with CO? Show Answer

Q38) Which one of the following molecules will have unequal bond length ? Show Answer

Q39) Which one has the lowest boiling point? Show Answer

Q40) Sodium hexametaphosphate is known as Show Answer

Q41) The reduction of calcined phosphate rock with coke and sand in an electric arc furnace at 1773 K gives a number of products including Show Answer

Q42) What are the product obtained when ammonia reacted with excess chlorine? Show Answer

Q43) The most stable hydride is Show Answer

Q44) Which of the following is a tetrabasic acid ? Show Answer

Q45) Metaphosphoric acid has the formula ? Show Answer

Q46) Basicity of orthophosphoric acid is Show Answer

Q47) The oxide which is the anhydride of orthophosphoric acid is Show Answer

Q48) At. No. of N is 7, the at. no. of the third member of nitrogen family will be Show Answer

Q49) The structural formula of hypophosphorous acid is Show Answer

Q50) Which of the following is an ionic compound ? Show Answer

Q51) The NO molecule Show Answer

Q52) Which among the following is a deliquescent ionic solid ? Show Answer

Q53) Which of the following catalysts is commonly employed in the manufacture of ammonia by the Haber's process ? Show Answer

Q54) A solution of sodium in liquid ammonia is blue due to the presence of Show Answer

Q55) Which of the following molecule is stable, not hydrolysed by water, and has little tendency to act as a donor ? Show Answer

Q56) By reacting with which of the following reagents does ammonia produce a brown precipitate ? Show Answer

Q57) Which of the following allotropic forms of phosphorus is the most stable, least reactive has a graphite-like structure, and is good conductor of electricity ? Show Answer

Q58) Among the following molecule, which contain the maximum number of P - H bonds ? Show Answer

Q59) Which of the following oxides of nitrogen is a mixed anhydride of two acids ? Show Answer

Q60) Which of the following statement is incorrect for nitric oxide ? Show Answer

Q61) Which among the following is the least basic ? Show Answer

Q62) Which of the following compound does not produce ammonia on heating ? Show Answer

Q63) Ammonia gas is dried over Show Answer

Q64) The number of P-O-P bonds in cyclic metaphosphoric acid is Show Answer

Q65) Laughing gas is Show Answer

Q66) The chemical used for cooling in refrigeration is Show Answer

Q67) Nitrogen is essential constituent of all Show Answer

Q68) Which of the following statement is not correct for nitrogen ? Show Answer

Q69) Which acts both as an oxidizing as well as reducing agent ? Show Answer

Q70) Which of the following can be used as an anaesthetic ? Show Answer

Q71) The shape of ammonia molecule is Show Answer

Q72) The aqueous solution/liquid that absorbs nitric oxide to a considerable extent is Show Answer

Q73) When ammonia nitrate is gently heated , an oxide of nitrogen is formed. What is the oxidation state of nitrogen in this oxide ? Show Answer

Q74) Which of the following not correct ? Show Answer

Q75) Which one of the following nitrogen oxides is the anhydride of nitrous acid ? Show Answer

Q76) Of the following which is paramagnetic and has three electron bond in its structure ? Show Answer

Q77) Nitrous oxide is Show Answer

Q78) One of the oxidants used with liquid propellants is Show Answer

Q79) Which one of the following is used in the industrial preparation of nitric acid by Ostwald's process ? Show Answer

Q80) Concentrated nitric acid oxidized phosphorus to Show Answer

Q81) Nitrogen dioxide Show Answer

Q82) Red P can be obtained from white P by Show Answer

Q83) Phosphine is produced by adding water to Show Answer

Q84) The number of hydroxyl groups in pyrophosphoric acid is Show Answer

Q85) Which oxide does not act as a reducing agent ? Show Answer

Q86) Which of the following is paramagnetic ? Show Answer

Q87) The P-P-P bond angle in white phosphorus is Show Answer

Q88) Which of the following fluorides does not exist ? Show Answer

Q89) When ammonia is passed over heated copper oxide , the metallic copper is obtained. The reaction show that ammonia is Show Answer

Q90) The correct sequence of decrease in the bond angle of the following hydrides is Show Answer

Q91) Which is most explosive ? Show Answer

Q92) The stability of the hydrides follows the order Show Answer

Q93) Among the trihalides of nitrogen which one is most basic ? Show Answer

Q94) Which of the following is a cyclic phosphate ? Show Answer

Q95) The acid which forms two series of salts is Show Answer

Q96) Which of the following has highest dipole moment ? Show Answer

Q97) Which of the following is metaphosphoric acid ? Show Answer

Q98) Which of the following non-metal possesses the atomicity half that of sulphur ? Show Answer

Q99) P-O-P bond is present in Show Answer

Q100) Which one of the following substance has the highest proton affinity ? Show Answer

Q101) What may be expected to happen when phosphine gas is mixed with chlorine gas ? Show Answer

Q102) Which of the following oxide of nitrogen is coloured gas ? Show Answer

Q103) The lighting in the atmosphere causes the formation of Show Answer

Q104) Nitrogen is liberated by the thermal decomposition of only Show Answer

Q105) On heating ammonium dichromate, the gas evolved is Show Answer

Q106) One mole of calcium phosphide on reaction with excess of water gives Show Answer

Q107) Nitrates of all metals are Show Answer

Q108) Oxidation state of phosphorus varies from Show Answer

Q109) The largest bond angle is in Show Answer

Q110) Slow acting nitrogenous fertilizer among the following is Show Answer

Q111) Liquid ammonia is used in refrigeration because of its Show Answer

Q112) Bone black is a polymorphic form of Show Answer

Q113) Which of the following oxy acids of phosphorus is a reducing agent and monobasic ? Show Answer

Q114) When tin is treated with concentrated nitric acid Show Answer

Q115) The number of hydrogen atom(s) attached to phosphorus atom in hypophosporus acid is Show Answer

Q116) Regular use of the following fertilizers increase the acidity of the soil ? Show Answer

Q117) The nitrogen oxide(s) that contains N - N bond(s) is(are) Show Answer

Q118) Ozone is not Show Answer

Q119) Which of the following oxides is a peroxide ? Show Answer

Q120) Polyanion formation is maximum in Show Answer

Q121) Acidified solution of sodium thisulphate are unstable because in thiosulphate Show Answer

Q122) Which is an oxidizing agent amongst the following Show Answer

Q123) Which of the following bonds has highest energy ?
Show Answer

Q124) Which is most acidic in nature ? Show Answer

Q125) All the element of oxygen family are Show Answer

Q126) Which of the following hydrides is most acidic ? Show Answer

Q127) Which is the best oxidizing agent among the following ? Show Answer

Q128) A group 16 element exists in monoatomic state in the metallic lattice. It also exists in two crystalline forms. The metal is Show Answer

Q129) Oxygen molecule is Show Answer

Q130) Which of the following causes damage to the building containing calcium and responsible for cough and choking in human? Show Answer

Q131) Which of the following is an oxoacid ? Show Answer

Q132) Which of the following is incorrect? Show Answer

Q133) Photoconductors of xerox machine uses Show Answer

Q134) Bond angle is minimum for Show Answer

Q135) Sulphur molecule is Show Answer

Q136) Ozone belong to which group of the periodic table ? Show Answer

Q137) Identify the incorrect statement with respect to ozone. Show Answer

Q138) Electron affinity of sulphur is Show Answer

Q139) The number of electron that are paired in oxygen molecule are Show Answer

Q140) Oxidation state of oxygen is zero in Show Answer

Q141) There is S-S bond in Show Answer

Q142) Iron sulphide is heated in air to form A , an oxide of sulphur. A is dissolved in water to give an acid. The basicity of this acid is ......... Show Answer

Q143) The manufacturing of sulphuric acid by the contact process involves the catalyst Show Answer

Q144) Which of the following is acidic ? Show Answer

Q145) Which of the following formula represent the fuming sulphuric acid (oleum) ? Show Answer

Q146) Which of the following properties is not correct for ozone ? Show Answer

Q147) Crystalline form of sulphur stable at room temperature is Show Answer

Q148) The element which has a simple cubic lattice in solid state is Show Answer

Q149) Which shows maximum catenation property ? Show Answer

Q150) Which of the following oxides reacts with HCl and NaOH ? Show Answer

Q151) Permonosulphuric acid is known as Show Answer

Q152) The metal with highest electrical resistance at room temperature is Show Answer

Q153) The compound containing coordinate bond is Show Answer

Q154) The compound of sulphur that can be used as refrigerant is Show Answer

Q155) Which would quickly absorb oxygen ? Show Answer

Q156) Which of the following behaves as both oxidising and reducing agent ? Show Answer

Q157) Which of the following is formed by the action of water on sodium peroxide ? Show Answer

Q158) Which of the following is not tetrahedral ? Show Answer

Q159) Which of the following is not linear ? Show Answer

Q160) Oleum is Show Answer

Q161) Oxygen will directly react with each of the following element except. Show Answer

Q162) What is the product formed when ozone reacts with mercury ? Show Answer

Q163) Ozone is formed in the upper atmosphere from oxygen by the action of Show Answer

Q164) An example of a neutral oxide is Show Answer

Q165) Atomicity of sulphur in rhombic sulphur is Show Answer

Q166) Which of the following species is basic and reducing ? Show Answer

Q167) Which of the following oxoacids of sulphur contain sulphur -sluphur double bond ? Show Answer

Q168) Which of the following molecule exists as a cyclic trimer in the solid state ? Show Answer

Q169) The number of S-S bonds in the cyclic trimer of sulphur trioxide is Show Answer

Q170) Which of the following acids is not a peroxo acid ? Show Answer

Q171) Elements of group 16 (except polonium) are called chalcogens because Show Answer

Q172) Which of the following statement is correct ? Show Answer

Q173) The oxidation number of sulphur i the cyclic trimer of sulphur trioxide is Show Answer

Q174) The acid used in lead storage cells is Show Answer

Q175) Which of the following has the highest dipole moment ? Show Answer

Q176) The type of hybridization in water molecule is Show Answer

Q177) Which of the following has the least bond angle? Show Answer

Q178) The number of unpaired electron in the p-subshell of oxygen atom Show Answer

Q179) Which has maximum number of oxo group ? Show Answer

Q180) Which of the following has the largest ionic size ? Show Answer

Q181) Which of the following isoelectronic ions has the lowest ionization energy ? Show Answer

Q182) Which of the following hydrides has the lowest boiling point ? Show Answer

Q183) The number of dative bonds in sulphuric acid molecule is Show Answer

Q184) Oleum is chemically known as Show Answer

Q185) In the manufacturing of sulphuric acid by contact process, tyndall box is used to Show Answer

Q186) A colourless gas with smell of rotten fish is Show Answer

Q187) In which of the following, the oxidation number of sulphur is -1 ? Show Answer

Q188) Structure of thiosulphuric acid is Show Answer

Q189) The structure of the tetrathionate ion is Show Answer

Q190) The structure of dithionate ion is Show Answer

Q191) The structure of oleum is Show Answer

Q192) All the following decompose easily on heating to give oxygen except Show Answer

Q193) Sulphuric has great affinity for water because Show Answer

Q194) When a colourless gas is passed through bromine water only decolourisation takes place. The gas is Show Answer

Q195) Which of the following is not a reducing agent ? Show Answer

Q196) Of the following set which one does not contain isoelectronic species ? Show Answer

Q197) Which one of the following is an amphoteric oxide ? Show Answer

Q198) A gas which cannot be collected over water is Show Answer

Q199) The compound which gives off oxygen on moderate heating is Show Answer

Q200) The first ionization potential in electron volts of nitrogen and oxygen atoms are respectively given by Show Answer

Q201) Hydrolysis of one mole of peroxodisulphuric acid produces Show Answer

Q202) The acid having O-O bond is Show Answer

Q203) There is no S-S bond in Show Answer

Q204) Which shows polymorphisum ? Show Answer

Q205) Number of bonds in sulphuric dioxide is Show Answer

Q206) Caro's acid is Show Answer

Q207) Sulphur in +3 oxidation state is present in Show Answer

Q208) Which of the following is monoatomic ? Show Answer

Q209) Noble gases do not react with other element because Show Answer

Q210) Least chemical activity is shown by Show Answer

Q211) Which of the following fluorides of xenon is impossible ? Show Answer

Q212) Which of the following has zero valency? Show Answer

Q213) A clathrate may be defined as a Show Answer

Q214) The most abundant noble gas found in atmosphere is Show Answer

Q215) The last member of the family of inert gases is Show Answer

Q216) Which of the following is the correct sequence of the noble gases in their group in the period table? Show Answer

Q217) The element which occupy the peaks of ionization energy curve are Show Answer

Q218) The noble gas lighter than air is Show Answer

Q219) Which of the following two are isostructural ? Show Answer

Q220) Noble gases are a group of element which exhibit very Show Answer

Q221) Which one of the following is correct pair with respect to molecular formula of xenon compound and hybridization state of xenon in it? Show Answer

Q222) Argon was discovered by Show Answer

Q223) Which of the following is not correct ? Show Answer

Q224) Which of the following outer electronic configuration represent argon ? Show Answer

Q225) The spectrum of helium is expected to be similar to that of Show Answer

Q226) Percentage of Ar in air is about Show Answer

Q227) Which of the following statement is not true about noble gases ? Show Answer

Q228) Number of unpaired electron in inert gas is Show Answer

Q229) Which of the following cannot be formed ? Show Answer

Q230) The lowest boiling point of helium is due to its Show Answer

Q231) What are the products formed in the reaction of xenon hexafluoride with silicon dioxide ? Show Answer

Q232) The correct order of solubility in water for He, Ne, Ar, Kr and Xe is Show Answer

Q233) If one litre of air is passed repeatedly over heated copper and magnesium till no further reduction in volume takes place, the volume takes place, the volume finally obtained would be approximately Show Answer

Q234) The density of nitrogen gas prepared from air is slightly greater than that of nitrogen prepared by a chemical reaction from a compound of nitrogen due to the presence of the following in aerial nitrogen Show Answer

Q235) The atomic mass of noble gases is determined with the help of the following relationship Show Answer

Q236) The forces acting between noble gas atoms are Show Answer

Q237) Which of the following statement about noble gases is false ? Show Answer

Q238) The noble gas forming maximum number of compounds in Show Answer

Q239) In the following four element, the ionization potential of which one is the highest ? Show Answer

Q240) Sea divers go deep in the sea water with a mixture of which of the following gases? Show Answer

Q241) The coloured discharge tubes for advertisement mainly contain Show Answer

Q242) Which one of the following element is most reactive ? Show Answer

Q243) What is the atomic number (Z) of the noble gas that reacts with fluorine ? Show Answer

Q244) Which noble gas is most soluble in water ? Show Answer

Q245) Which of the following noble gas has highest polarizability ? Show Answer

Q246) Which of the following is an inert gas ? Show Answer

Q247) In the clathrates of xenon with water, the nature of bonding between xenon and water molecule is Show Answer

Q248) Which element out of He, Ar, Kr and Xe forms least number of compound? Show Answer

Q249) Which is a planar molecule? Show Answer

Q250) The fluoride of xenon with zero dipole moment is Show Answer

Q251) Which of the following noble gases is the least polarized ? Show Answer

Q252) Noble gases are difficult to liquefy because their Show Answer

Q253) Which of the following statement is incorrect ? Show Answer

Q254) Helium is suitable for low temperature gas thermometry because of its Show Answer

Q255) Which of the following is superfluid ? Show Answer

Q256) The noble gas which forms interstitial compound with metals is Show Answer

Q257) The noble gas commonly used in cryogenic study is Show Answer

Q258) Which of the following noble gas is radioactive in nature ? Show Answer

Q259) Which species is not known ? Show Answer

Q260) Noble gases can be separated by Show Answer

Q261) Xenon best reacts with Show Answer

Q262) The compound that attacks pyrex glass is Show Answer

Q263) Noble gases do not occur in Show Answer

Q264) Liquid flow from a higher to a lower level. Which of the following liquid can climb up the wall of the glass vessel in which it is placed ? Show Answer

Q265) The ease of liquefaction of noble gases decrease in the order Show Answer

Q266) B.p.t and m.p.t of inert gases are Show Answer

Q267) Which statement is correct ? Show Answer

Q268) Helium-oxygen is mixture used by deep sea divers in preference to nitrogen-oxygen mixture because Show Answer

Q269) Among the noble gases (From He to Xe) only xenon reacts with fluorine to form stable xenon fluorides because xenon Show Answer

Q270) The value of ionization potential for inert gases is Show Answer

Q271) The noble gas was first time discovered by Show Answer

Q272) Which of the following noble gases is not present in atmosphere ? Show Answer

Q273) Which of the following statement is not correct for a noble gas? Show Answer

Q274) Which of the following noble gases does not have an octet of electron in its outermost shell? Show Answer

Q275) Gradual addition of electronic shell in the noble gases causes a decrease in their Show Answer

Q276) The noble gas which was discovered first in the sun and then on the earth Show Answer

Q277) In which of the following groups, when helium is placed, all its properties are satisfied ? Show Answer

Q278) Which one of the following statement regarding helium is incorrect? Show Answer

Q279) Asthma patients use a mixture of ....... for respiration Show Answer

Q280) Which one of the following reactions of xenon compounds not feasible? Show Answer

Q281) Sea weeds are important source of Show Answer

Q282) Bromine is obtained on a commercial scale from Show Answer

Q283) In which of the following, oxygen has +2 oxidation number Show Answer

Q284) Bad conductor of electricity is Show Answer

Q285) Which of the following is the strongest oxidizing agent? Show Answer

Q286) Iodine readily dissolves in potassium iodine solution giving Show Answer

Q287) Hydrogen fluoride is liquid unlike other hydrogen halides because Show Answer

Q288) Oxidizing action increases in the following order Show Answer

Q289) Which has the highest molar heat of vaporization? Show Answer

Q290) Which of the following bonds will be most polar? Show Answer

Q291) Which one of the following can be purified by sublimation? Show Answer

Q292) Hydrogen bonding does not play any role in boiling of Show Answer

Q293) Which one of the following sequences represents the correct increasing order of bond angles in the given molecules? Show Answer

Q294) Which one of the following elements can have both positive and negative oxidation state? Show Answer

Q295) The element which never acts as a reducing agent in a chemical reaction is Show Answer

Q296) The aqueous solution of which of the following has maximum pH? Show Answer

Q297) Which of the following represents calcium chlorite? Show Answer

Q298) The correct order of reactivity of halogens with alkalies in Show Answer

Q299) Which of the following reaction involves oxidation and reduction? Show Answer

Q300) The halogen that is most easily reduced is Show Answer

Q301) At room temperature, HCl is a gas while HF is a low boiling liquid. This is because Show Answer

Q302) Hydrogen bond is strongest in Show Answer

Q303) For electron affinity of halogens which of the following is correct? Show Answer

Q304) Which one of the following statements about halogens is correct? Show Answer

Q305) The isoelectronic pair is Show Answer

Q306) Mark the smallest atom. Show Answer

Q307) Iodine deficiency in diet is known to cause Show Answer

Q308) Bleaching powder is obtained by the action of chlorine gas and Show Answer

Q309) Which halogen is the most electrospositive? Show Answer

Q310) Bleaching powder reacts with a few drops of conc. HCl to give Show Answer

Q311) Correct order of the size of iodine species is Show Answer

Q312) Which of the following arrangement for the three halogens Cl, Br and I when placed in the order of their increasing electron affinity is correct? Show Answer

Q313) Which statement is correct about halogens? Show Answer

Q314) Elements of which of the following groups will form anions most readily? Show Answer

Q315) The correct sequence of arrangement of the following compounds in order of decreasing oxidation numbers of iodine is Show Answer

Q316) Which of the following elements is extracted commercially by the electrolysis of an aqueous solution of its compound? Show Answer

Q317) Which of the following is most basic? Show Answer

Q318) Which one of the following oxyacids of chlorine is the least oxidizing in nature? Show Answer

Q319) Which is the weakest acid out of HF, HCl, HBr and HI? Show Answer

Q320) Which of the following cannot work as oxidising agent? Show Answer

Q321) Chlorine is liberated when we heat Show Answer

Q322) Which of the following is used in the preparation of chlorine? Show Answer

Q323) Freon is used as a Show Answer

Q324) Which of the following is incorrect with respect to property indicated? Show Answer

Q325) Which of the following elements shows different oxidation states? Show Answer

Q326) What is the oxidation state of chlorine in hypochlorous acid? Show Answer

Q327) Which one of the following halogen liberates oxygen, when passed through hot concentrated KOH solution? Show Answer

Q328) "Fluorosis" disease is caused due to the reaction of ........ With excess of fluoride in the body Show Answer

Q329) The set with correct order of acidity is Show Answer

Q330) Iodine can exist in the oxidation states Show Answer

Q331) Which one of the halogen acid is a liquid? Show Answer

Q332) Euchlorine is a mixture of Show Answer

Q333) Which of the following halogen oxides is ionic? Show Answer

Q334) Which of the following is a false statement? Show Answer

Q335) The bleaching action of chlorine is due to Show Answer

Q336) Strongest hydrogen bonding is shown by Show Answer

Q337) Which of the following sets has strongest tendency to form anions? Show Answer

Q338) Charge distribution in iodine mono-chloride is best represented as Show Answer

Q339) Which among the following is paramagnetic? Show Answer

Q340) Which of the following is not the characteristic of interhalogen compounds? Show Answer

Q341) Which of the following halogen does not exhibit positive oxidation state in its compounds? Show Answer

Q342) Which bond is most polar? Show Answer

Q343) Which of the following sets gives the correct arrangement of the compounds involved based on their bond strengths? Show Answer

Q344) Which of the following elements exhibits the most basic properties? Show Answer

Q345) Dilute hydrochloric acid solution cannot be concentrated by boiling beyond Show Answer

Q346) The compounds used as gaseous insulators in high voltage generators is Show Answer

Q347) Which of the following acid is weakest? Show Answer

Q348) Which one of the following is the true covalent oxide of iodine? Show Answer

Q349) As the atomic number of halogens increases, the halogens Show Answer

Q350) The type of bonding in HCl molecule is Show Answer

Q351) Which of the following species has four lone pairs of electrons? Show Answer

Q352) When chlorine is passed over dry slaked lime at room temperature, the main reaction product is Show Answer

Q353) A solution of potassium bromide is treated with each of the following. Which one would liberate bromine? Show Answer

Q354) An element has an atomic mass 19 and atomic number 9. Its ion is represented by Show Answer

Q355) Fluorine does not show positive oxidation states due to the absence of Show Answer

Q356) Electrolysis of brine produces Show Answer

Q357) Which of the following compounds is the strongest fluorideion acceptor? Show Answer

Q358) Which of the following is arranged in order of increasing ionic character? Show Answer

Q359) Which of the following statements is correct? Show Answer

Q360) Which of the following interhalogens does not exist? Show Answer

Q361) Which of the following statements is correct? Show Answer

Q362) Certain ions, with properties similar to halide ions, have two or more atoms of which at least one is nitrogen. Such ions are called Show Answer

Q363) Which of the following is not a pseudohalide ion? Show Answer

Q364) Chlorine can be manufactured by the oxidation of HCl in air by Show Answer

Q365) The ionic character of the metal-halogen bond (M - X) in metal halides decreases in the order Show Answer

Q366) Hydrofluoric acid cannot be stored in glass vessels because it reacts with glass to form Show Answer

Q367) Which of the following shows the arrangement of halide ions in increasing order of reducing property? Show Answer

Q368) Which of the following is not linear? Show Answer

Q369) Which of the following has greatest reducing power? Show Answer

Q370) Which of the following halogens does not from oxyacids? Show Answer

Q371) Which of the following pairs is not correctly matched? Show Answer

Q372) Chlorine cannot displace Show Answer

Q373) Unlike other halogens, fluorine does not show higher oxidation states because Show Answer

Q374) Which of the following belongs to the halogen family? Show Answer

Q375) Fluorine is a stronger oxidizing agent than chlorine in aqueous solution. This is attributed to many factors except Show Answer

Q376) Which of the following halogens has metallic character? Show Answer

Q377) Among F, Cl, Br, and I the lowest ionization potential will be of Show Answer

Q378) The electronegativity follows the order Show Answer

Q379) The electron affinity of the halogens follows the order Show Answer

Q380) The one with the largest size is Show Answer

Q381) Which of the following is the strongest acid? Show Answer

Q382) Halogen which can be prepared from caliche is Show Answer

Q383) Among the halogens, the one which is oxidized by nitric acid is Show Answer

Q384) A greenish yellow gas reacts with an alkali metal hydroxide to form a halite which can be used in fire works and safety matches. The gas and halite respectively are Show Answer

Q385) Which of the following is used as an antiseptic? Show Answer

Q386) Which of the following pairs will give chlorine gas most quickly upon reaction? Show Answer

Q387) Which of the following is most volatile? Show Answer

Q388) Which of the following has the stronger bond? Show Answer

Q389) Which has the highest bond energy? Show Answer

Q390) Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that Show Answer

Q391) The correct order of the thermal stability of hydrogen halides (H - X) is Show Answer

Q392) Which of the following is most stable to heat? Show Answer

Q393) Chlorine acts as bleaching agent only in presence of Show Answer

Q394) Bromine can be liberated from potassium bromide solution by the action of Show Answer

Q395) Which of the following is the strongest acid? Show Answer

Q396) The element which exist/s in the liquid state is / are Show Answer

Q397) The halogen which is most easily reduced is Show Answer

Q398) Which one of the following species is not a pseudohalide? Show Answer

Q399) The correct order of acidic strength is Show Answer

Q400) Which species has the maximum number of lone pair of electrons on the central atom? Show Answer

Q401) Identify the incorrect statement among the following. Show Answer

Q402) Increasing order of acid strength of halogen acid is Show Answer

Q403) Solubility of iodine in water may be increased by adding Show Answer

Q404) The correct order of pseudohalide, polyhalide and interhalogen are Show Answer

Q405) Which can do glass etching? Show Answer

Q406) Which is strongest acid? Show Answer

Q407) What products are expected from the disproportionation reaction of hypochlorous acid? Show Answer

Q408) Which one of the following configuration represents a noble gas? Show Answer

Q409) Which halogen do not form polyhalide ion? Show Answer

Q410) Oxygen is manufactured by fractional distillation of: Show Answer

Q411) Which is not the property of nitrogen? Show Answer

Q412) Which metal loses its meniscus after reaction with ozone? Show Answer

Q413) The two electrons in helium atom: Show Answer

Q414) Which of the following is not tetrahedral? Show Answer

Q415) Clathrates are Show Answer

Q416) Two pungent smelling gases bleach a certain substance. The gases may be: Show Answer

Q417) NaOH can absorb : Show Answer

Q418) Nitrogen is an essential constituent of all: Show Answer

Q419) The electron affinity of halogens shows the order: Show Answer

Q420) Mark the halogen which shows electropositive character: Show Answer

Q421) On heating ozone its volumes: Show Answer

Q422) Which of the following is called Berthelot's salt? Show Answer

Q423) A compound which leaves behind no residue on heating is: Show Answer

Q424) Phosphine on reaction with hydrobromic acid gives: Show Answer

Q425) Bleaching powder has the molecular formula: Show Answer

Q426) Which of the following is pseudohalogen? Show Answer

Q427) Six volumes of oxygen, on complete ozonisation, form …. Volumes of ozone. Show Answer

Q428) The decreasing order of b.p. or m.p. of halogens is: Show Answer

Q429) Ozonization of water is carried out to remove: Show Answer

Q430) Iodine solution stained on clothes can be removed by: Show Answer

Q431) Nitrogen (I) oxide is produced by: Show Answer

Q432) Welding of magnesium can be done in an atmosphere of Show Answer

Q433) Which noble gas is not found in atmosphere? Show Answer

Q434) An inorganic compound producing organic compound on heating is: Show Answer

Q435) The substance which does not liberate oxygen on treatment with ozone is Show Answer

Q436) Formula of calcium chlorite is: Show Answer

Q437) The gas not absorbed by coconut charcoal is Show Answer

Q438) Lead nitrate on heating gives lead oxide, nitrogen dioxide and oxygen. The reaction is known as: Show Answer

Q439) A black sulphide when treated with ozone becomes white. The white compound is: Show Answer

Q440) Which hydride is the strongest base? Show Answer

Q441) Which forms maximum compounds with xenon? Show Answer

Q442) Claude's process is used in the manufacture of: Show Answer

Q443) Sulphur on oxidation with hot sulphuric acid gives: Show Answer

Q444) Which is a saline oxide? Show Answer

Q445) Which set of elements has the strong tendency to form anions? Show Answer

Q446) Which loses weight on exposure to the atmosphere? Show Answer

Q447) The correct order of heat of formation of halogen acids is? Show Answer

Q448) Light blue colour of nitrous acid is due to dissolved: Show Answer

Q449) The number of P-O-P bridges in the structure of phosphorus pentoxide and phosphorus trioxide are respectively Show Answer

Q450) Rhombic and monoclinic sulphur are: Show Answer

Q451) Which one of the following pairs of reactants does not form oxygen when they react with each other? Show Answer

Q452) Oxide of a non-metal possesses the following characteristics:
(i) It is both a proton donor and proton acceptor.
(ii) It is poor conductor of electricity.
(iii) It reacts readily with basic and acidic oxides.
(iv) It oxidses Fe at boiling point.
The oxide is: Show Answer

Q453) Which of the following is a metalloid? Show Answer

Q454) Which of the following is more acidic in nature? Show Answer

Q455) The weakest acid is Show Answer

Q456) Most unstable hydride is Show Answer

Q457) Which element is most metallic? Show Answer

Q458) Concentrated nitric acid reacts with iodine to give: Show Answer

Q459) Phosphide ion has the electronic structure similar to that of: Show Answer

Q460) Electron affinity for a noble gas is approximately equal to: Show Answer

Q461) The gaseous mixture used by deep sea divers for respiration is: Show Answer

Q462) A gas that cannot be collected over water is Show Answer

Q463) Which is used in the manufacture of safe matchsticks? Show Answer

Q464) Which of the following is not hydrolysed? Show Answer

Q465) The m. p. and b. p. is lowest for: Show Answer

Q466) Chlorine, bromine and iodine are placed in the seventh group of the periodic table because: Show Answer

Q467) Nitric acid whether diluted or concentrated: Show Answer

Q468) An element belongs to group 15 and third period of the periodic table. Its electronic configuration will be Show Answer

Q469) The number of p-electrons in bromine atom is: Show Answer

Q470) The reagent used for testing ammonia is: Show Answer

Q471) Which species has the largest dipole moment? Show Answer

Q472) Elements of nitrogen family having allotropic forms are: Show Answer

Q473) An example of tetrabasic acid is: Show Answer

Q474) Nitrogen can be purified from the impurities of oxides of nitrogen and ammonia by passing through: Show Answer

Q475) Which statement is correct? Show Answer

Q476) Calcium phosphide is: Show Answer

Q477) Phosphoric acid is syrupy liquid due to: Show Answer

Q478) Which of the following inert gas liquefies easily? Show Answer

Q479) Nitric acid may be kept in a bottle of: Show Answer

Q480) Which is not poisonous? Show Answer

Q481) In sulphate ion the oxidation state of sulphur is +6 and the hybridization state of sulphur is: Show Answer

Q482) The least stable hydride of 15th group elements is Show Answer

Q483) Which of the light effective in the formation of chlorophyll? Show Answer

Q484) Which of the following is an explosive compound? Show Answer

Q485) The element evolving two different gases on reaction with conc. Sulphuric acid is Show Answer

Q486) Which statement is correct? Show Answer

Q487) The noble gas which forms maximum number of compounds is Show Answer

Q488) The most abundant element in the earth crust is Show Answer

Q489) Blasting of TNT is done by mixing it with: Show Answer

Q490) Man dies, when nitrous oxide is inhaled in large quantities because it: Show Answer

Q491) The most reactive allotropic form of phosphorus is: Show Answer

Q492) Nitrogen gas is absorbed by: Show Answer

Q493) The strongest acid amongst the following is Show Answer

Q494) ….. liberates oxygen from water. Show Answer

Q495) The hydroxide of which metal is soluble in excess of ammonia: Show Answer

Q496) Which group is called buffer group of the periodic table? Show Answer

Q497) Gradual addition of electronic shells in the noble gases causes a decrease in their Show Answer

Q498) Sodium pyrophosphate is represented by which of the following formula? Show Answer

Q499) Colour of iodine solution is disappeared by shaking it with aqueous solution of Show Answer

Q500) S—S bond is not present in Show Answer

Q501) Sequence of acidic character is: Show Answer

Q502) Phosphorus is manufactured by heating …… in a furnace. Show Answer

Q503) A radioactive element is: Show Answer

Q504) Which of the following(s) when heated give nitrogen gas? Show Answer

Q505) Metalloid among the following is: Show Answer

Q506) Which oxide of nitrogen is coloured gas? Show Answer

Q507) Ozone is readily dissolved in: Show Answer

Q508) The basic character of hydrides of the V-group elements decreases in the order Show Answer

Q509) Consider the following compounds:
1. Sulphur dioxide
2. Hydrogen peroxide
3. Ozone
Among these compounds identify those that can act as bleaching agent. Show Answer

Q510) Different allotropic forms of sulphur differ in: Show Answer

Q511) Phosphorus compound used as drying agent and desiccating agent is: Show Answer

Q512) Monoatomic element of nitrogen family is: Show Answer

Q513) Which noble gas was first of all detected in solar chromosphere? Show Answer

Q514) How many bonding electron pairs are there in white phosphorus? Show Answer

Q515) Which of the following does not react with fluorine? Show Answer

Q516) Which of the following causes damage to the building containing calcium and responsible for cough and choking in human? Show Answer

Q517) The acid used in lead storage battery is: Show Answer

Q518) Halogen used in the preparation of insecticides is: Show Answer

Q519) Which halogen acid is a liquid? Show Answer

Q520) Halon-1301 is Show Answer

Q521) The pair of species having identical shape for molecules of both species is Show Answer

Q522) Which molecule does not possess distorted geometry? Show Answer

Q523) Iodine displaces chlorine from which one of the compounds? Show Answer

Q524) Which member of oxygen family has the highest catenation ability? Show Answer

Q525) The noble gas used in the preparation of first noble gas compound was: Show Answer

Q526) On heating ammonium dichromate, the gas evolved is: Show Answer

Q527) Regular use of which of the following fertilizers increases the acidity of soil? Show Answer

Q528) Nitric oxide is: Show Answer

Q529) Mark the wrong statement. Halogens are all coloured. Show Answer

Q530) Which reaction can be used to prepare phosphoric acid? Show Answer

Q531) The last member of inert gas family is: Show Answer

Q532) Which gas is filled in electric bulbs/tubes? Show Answer

Q533) Helium–oxygen mixture is used by deep by sea divers in preference to nitrogen oxygen mixture because Show Answer

Q534) Iodine is formed when potassium iodide reacts with a solution of Show Answer

Q535) Among the fluorides below, the one which does not exist is Show Answer

Q536) The percentage of nitrogen in air remains almost constant due to: Show Answer

Q537) The bleaching action of bleaching powder is due to Show Answer

Q538) Which noble gas has highest and least polarisability respectively? Show Answer

Q539) The metal which does not form ammonium nitrate by reaction with dilute nitric acid is Show Answer

Q540) Nitrolim, a nitrogeneous fertilizer, is: Show Answer

Q541) The deficiency of iodine in diet causes Show Answer

Q542) Which noble gas is more soluble in water? Show Answer

Q543) Liquid oxygen is: Show Answer

Q544) Which statement about noble gases is not correct? Show Answer

Q545) Noble gases are group of elements which exhibit very Show Answer

Q546) Ozone reacts with: Show Answer

Q547) The inert gas abundantly found in atmosphere is Show Answer

Q548) The reaction of chlorine with CO in the presence of sunlight gives: Show Answer

Q549) The mixture of noble gases is separated by: Show Answer

Q550) The boiling points of halogens increase with increase in molecular weight, it is because: Show Answer

Q551) The strongest oxidizing agent is: Show Answer

Q552) Increasing order of acid strengths of hydrogen halides is: Show Answer

Q553) Noble gases are sparingly soluble in water due to Show Answer

Q554) Which is monoatomic? Show Answer

Q555) Oxidation state exhibited by sulphur Show Answer

Q556) Which gas can be collected over water? Show Answer

Q557) The gases absorbed by alkaline pyrogallol and oil of turpentine respectively are: Show Answer

Q558) Ozone turns tetramethyl base paper: Show Answer

Q559) Aquaregia is a mixture of: Show Answer

Q560) Statement 1 : Helium is the only substance that can't be solidified at atmospheric pressure.
Statement 2 : The zero point energy of helium is very high. Show Answer

Q561) Statement 1 : The van der Waals' forces are directly proportional to the ionisation potentials.
Statement 2 : Van der Waals' forces increases as the size and diffuseness of the electron clouds increases. Show Answer

Q562) Number of hydroxyl groups present in pyrosulphuric acid is Show Answer

Q563) Statement 1 : Red phosphorus is less volatile than white phosphorus.
Statement 2 : Red phosphorus has a discrete tetrahedral structure. Show Answer

Q564) Which is not an acid salt? Show Answer

Q565) Statement 1 : The ionization energy of gallium remains nearly same as that of aluminium.
Statement 2 : This is due to shielding of outer shell electrons form the nucleus by the d electrons of gallium. Show Answer

Q566) In fisher-Ringe's method of separation of noble gas mixture from air, ………. Is used. Show Answer

Q567) A colourless gas on passing through bromine water decolourises it. The gas is: Show Answer

Q568) In the manufacture of sulphuric acid by contact process, tyndall box is used to Show Answer

Q569) The oxide insoluble in water is: Show Answer

Q570) Which indicates the common laboratory method for the preparation of chlorine? Show Answer

Q571) Chlorine acts as a bleaching agent only is presence of Show Answer

Q572) Which one of the following pentafluorides cannot be formed? Show Answer

Q573) Which of the following has highest proton affinity? Show Answer

Q574) Nuclear fusion produces: Show Answer

Q575) In the dewar's method of separation of noble gases, the mixture of noble gases is kept in contact with coconut charcoal at 173 k . Which one of the following gaseous mixtures is not adsorbed on to the charcoal? Show Answer

Q576) The X—X bond dissociation energy is minimum in: Show Answer

Q577) Which is soluble in water? Show Answer

Q578) The oxidation state of N is highest in: Show Answer

Q579) Formula of rhombic Sulphur is: Show Answer

Q580) The noble gases are unreactive because they: Show Answer

Q581) Phosphine reacts with copper sulphate solution to form: Show Answer

Q582) Desicchlora is Show Answer

Q583) Who among the following first prepared a stable compound of noble gas? Show Answer

Q584) Colour of iodine solution can be discharged by shaking it with aqueous solution of: Show Answer

Q585) Which of the following is called stranger gas? Show Answer

Q586) Sulphuric acid has great affinity for water because Show Answer

Q587) Major credit for the discovery of noble gases is given to: Show Answer

Q588) Noble gases possess: Show Answer

Q589) What would happen when a solution of potassium chromate is treated with an excess of dilute nitric acid? Show Answer

Q590) A green yellow gas reacts with an alkali metal hydroxide to form a halate which can used in fireworks and safety matches. The gas and halate respectively are Show Answer

Q591) When plants and animals decay, the organic nitrogen is converted into inorganic nitrogen Show Answer

Q592) Which of the following species is not a pseudohalide? Show Answer

Q593) Sulphur is soluble in: Show Answer

Q594) Which of the following is formed by xenon? Show Answer

Q595) The oxide which is solid at room temperature is: Show Answer

Q596) Which hydride possesses the maximum complex forming nature? Show Answer

Q597) Bad conductor of electricity is: Show Answer

Q598) The van der Waals' forces in halogens decrease in the order: Show Answer

Q599) With cold and dilute sodium hydroxide fluorine reacts to give Show Answer

Q600) Which hydride does not exist? Show Answer

Q601) Ozone is formed by the interaction of water with: Show Answer

Q602) Which reaction is not valid? Show Answer

Q603) The lattice energy of lithium halides in the following order Show Answer

Q604) Iodine readily dissolves in potassium iodide solution giving Show Answer

Q605) Which one of the following is not true at room temperature and pressure? Show Answer

Q606) Which of the following acid posses oxidising, reducing and complex forming properties? Show Answer

Q607) Ammonium chloride is removed from its mixture by: Show Answer

Q608) White smoke is formed when ammonia gas meets with: Show Answer

Q609) The acid used in soft drinks is: Show Answer

Q610) Which of the elements of group VA does not show allotropy? Show Answer

Q611) In the electrothermal process, the compound displaced by silica from calcium phosphate is Show Answer

Q612) It is possible to obtain oxygen from air by fractional distillation because: Show Answer

Q613) Which is most basic of the following oxides? Show Answer

Q614) Which is stronger acid? Show Answer

Q615) Ammonia on reaction with hypochlorite anion, can form Show Answer

Q616) Which of the following compounds do not exist? Show Answer

Q617) Oxidation of ammonia by CuO yields: Show Answer

Q618) The correct order for decreasing acidic strength of oxoacids of gp.15 is: Show Answer

Q619) For chrome plating the electrolytic bath contains: Show Answer

Q620) Chlorine gas can be dried by passing over: Show Answer

Q621) At T (K), 100 L of dry oxygen is present in a sealed container. It is subjeceted to silent electric discharge, till the volumes of oxygen and ozone becomes equal .what is the volume of ozone formed at T (K)? Show Answer

Q622) What is the correct order of occurrence (% by weight) in air of Ne, Ar and Kr? Show Answer

Q623) The source of most of the noble gases is: Show Answer

Q624) Paramagnetic oxide of chlorine is : Show Answer

Q625) Pure HBr gas may be obtained by heating sodium bromide with syrupy phosphoric acid and not with concentrated sulphuric acid because concentrated sulphuric acid is: Show Answer

Q626) Fertilizer having the highest nitrogen percentage is: Show Answer

Q627) The first noble gas compound obtained was: Show Answer

Q628) Which one of the following represents noble gas configuration? Show Answer

Q629) There is no S−S bond is Show Answer

Q630) Sulphurous acid can be used as: Show Answer

Q631) The ease of liquefaction of noble gases decreases in the order: Show Answer

Q632) Decreasing order of reducing power of hydrogen halides is : Show Answer

Q633) Which one of the following reacts with glass? Show Answer

Q634) Super halogen is: Show Answer

Q635) The gas which is supporter of combustion is: Show Answer

Q636) The halide that cannot act as Lewis acid is: Show Answer

Q637) Which gives off oxygen on moderate heating? Show Answer

Q638) Which is the true covalent oxide of iodine? Show Answer

Q639) Which element out of He, Ar, Kr and Xe forms least number of compounds? Show Answer

Q640) Nitrogen does not combine directly with: Show Answer

Q641) Which of the following is the strongest oxidizing agent? Show Answer

Q642) Approximately what percentage of air by volume gets used in a process of combustion? Show Answer

Q643) In case of halogen family, which trend occurs as the atomic number increases? Show Answer

Q644) What is the product formed when phosphorus trioxide is dissolved in water? Show Answer

Q645) Xenon directly combines with: Show Answer

Q646) The last orbit of argon would have electrons Show Answer

Q647) Phosphine is not evolved when: Show Answer

Q648) The acidic nature of HF can be increased in presence of: Show Answer

Q649) Identify the incorrect statement among the following : Show Answer

Q650) Which of the following oxides are acidic? Show Answer

Q651) The pentavalence in phosphorus is more stable as compared to that of nitrogen even though they belong to the same group. It is due to Show Answer

Q652) With excess of chlorine, ammonia forms: Show Answer

Q653) Which of the following is kept in water? Show Answer

Q654) The formula of iodine acetate is: Show Answer

Q655) The anhydride of hypochlorous acid is: Show Answer

Q656) Anhydrone is: Show Answer

Q657) Thermal stability of hydrogen halide follows the order: Show Answer

Q658) The correct order of boiling points of the hydrides of nitrogen family is Show Answer

Q659) In which process sulphur is not used? Show Answer

Q660) When the mineral clevite is heated, it give off the inert gas Show Answer

Q661) Iodine is fromed when KI reacts with solution of Show Answer

Q662) Used as desiccant. Show Answer

Q663) Oxygen is not readily reacted with Show Answer

Q664) The strongest reducing agent among the following is Show Answer

Q665) Most acidic oxide among the following is Show Answer

Q666) Which one has the highest bond energy? Show Answer

Q667) Liquid flow from a higher to a lower level. Which of the following liquids can climb up the wall of the glass
vessel in which it is placed? Show Answer

Q668) Pure nitrogen can be prepared from Show Answer

Q669) Fluorine can be free from HF by passing the mixture through: Show Answer

Q670) Which of the following noble gases is most reactive? Show Answer

Q671) Fluorine is usually obtained from: Show Answer

Q672) First stable compound of inert gas was prepared by: Show Answer

Q673) Mark the strongest acid Show Answer

Q674) Which is incorrect for bleaching powder? Show Answer

Q675) The strongest acidic oxide is: Show Answer

Q676) The most basic hydride is Show Answer

Q677) Phosphorus pentoxide cannot be used to dry: Show Answer

Q678) Apatite is an ore of Show Answer

Q679) Calcium cyanamide on treatment with steam produces Show Answer

Q680) A hydride of nitrogen having lowest oxidation number of N: Show Answer

Q681) Copper turnings when heated with concentrated sulphuric acid will give Show Answer

Q682) Chlorine acts as a bleaching agent only in presence of Show Answer

Q683) Swimming pools are disinfected by bubbling through water with a controlled quantity of: Show Answer

Q684) Chlorine water on cooling deposits greenish-yellow crystals of: Show Answer

Q685) Which inert gas have highest boiling point? Show Answer

Q686) A glass tube containing molten antimony breaks upon solidification of antimony due to: Show Answer

Q687) Metaphosphoric acid is Show Answer

Q688) Which one of the following statements regarding helium is incorrect? Show Answer

Q689) Hydrogen bromide is dried by passing the gas through: Show Answer

Q690) By warming a paste of bleaching powder with a solution of ammonia, we get: Show Answer

Q691) The ion that cannot undergo disproportionation is: Show Answer

Q692) Which of the following is the most basic oxide? Show Answer

Q693) Phosphine is generally prepared in the laboratory? Show Answer

Q694) The correct order of acidic nature is: Show Answer

Q695) The most abundant inert gas in air is: Show Answer

Q696) The van der Waal’s forces are the greatest in: Show Answer

Q697) Which of the following hydrogen halides has the highest boiling point? Show Answer

Q698) Starch paper moistened with KI solution turns blue in ozone because of: Show Answer

Q699) Which of the following statement is not true? Show Answer

Q700) In which of the following chlorine is not used: Show Answer

Q701) The molecular formula of dithionic acid is Show Answer

Q702) Platinum, palladium and iridium are called noble metals because Show Answer

Q703) Bleaching powder is disinfectant for purification of water. When water born germs are killed. But disinfectant activity is destroyed. It is due to disproportion into Show Answer

Q704) Marshall's acid is: Show Answer

Q705) The correct order of pseudohalide ,polyhalide and interhalogen are Show Answer

Q706) The word neon signifies: Show Answer

Q707) Paramagnetic oxide is: Show Answer

Q708) Fluorosis disease is caused due to the reaction of …….. with excess of fluorine in the body. Show Answer

Q709) Which one is correct statement? Show Answer

Q710) Among the halogens, the one which is oxidised by nitric acid is Show Answer

Q711) Which has the lowest boiling point? Show Answer

Q712) The elements S, Se, Te can have two positive oxidation states. Which one of the following is correct? Show Answer

Q713) Which sulphide is used in the manufacture of "strike anywhere" matches? Show Answer

Q714) Liquid oxygen: Show Answer

Q715) The substance which is solid at room temperature forms ionic compounds and reacts with hydrogen forming a hydride, the aqueous solution of which is acidic, could be Show Answer

Q716) Oxide of nitrogen which is soluble in alcohol is: Show Answer

Q717) Ammonia water is a good cleaning agent because it: Show Answer

Q718) A clathrate is defined as a: Show Answer

Q719) The correct order of reducing abilities of hydrides of V group elements is Show Answer

Q720) Available chlorine is liberated from bleaching powder when it: Show Answer

Q721) Ordinary oxygen contains: Show Answer

Q722) A salt of sulphurous acid is called: Show Answer

Q723) Metal halide which is insoluble in water is Show Answer

Q724) Chlorine bleaches only in the: Show Answer

Q725) The sides of safety matches contains Show Answer

Q726) Phosphine is: Show Answer

Q727) Antimony dissolves in aquaregia to give: Show Answer

Q728) In the isolation of fluorine, a number of difficulties were encountered. Which statement is correct? Show Answer

Q729) Thomas slag is: Show Answer

Q730) Dinitrogen pentoxide a colourless solid is prepared by Show Answer

Q731) Which of the following elements is radioactive? Show Answer

Q732) Ammonium compound not used as a fertilizer is: Show Answer

Q733) Which one of the following reactions of Xenon compounds is not feasible? Show Answer

Q734) Javelle water is: Show Answer

Q735) Which one is most electronegative? Show Answer

Q736) The strongest acid is: Show Answer

Q737) Orthophosphoric acid on heating gives: Show Answer

Q738) The largest bond angle exists in: Show Answer

Q739) Increasing order of strength of oxo-acids of chlorine is: Show Answer

Q740) Which oxide is more acidic? Show Answer

Q741) The correct order of bond angles and stability of hydrides given below is: Show Answer

Q742) Which oxide do not act as a reducing agent? Show Answer

Q743) When chlorine reacts with dil. NaOH under cold conditions, the oxidation state of chlorine changes from zero to Show Answer

Q744) Fuming sulphuric acid is Show Answer

Q745) Yellow ammonium sulphide is: Show Answer

Q746) The weakest acid is: Show Answer

Q747) Sulphuric acid is used: Show Answer

Q748) The smell of nitrogen dioxide is: Show Answer

Q749) The gas obtained when urea reacts with nitrous acid is: Show Answer

Q750) Halogen used as an antiseptic is: Show Answer

Q751) Nitrous oxide Show Answer

Q752) The species that does not contain peroxide ion is Show Answer

Q753) The gas used for inflating the tyres of aeroplanes is: Show Answer

Q754) Fluorapatite is a mineral of: Show Answer

Q755) The element present in combined state in Laminaria stenophylla is: Show Answer

Q756) Least malleable and ductile metal is: Show Answer

Q757) Phosphine is prepared by the reaction of Show Answer

Q758) In the manufacture of bromine from sea water, the mother liquor containing bromide is treated with Show Answer

Q759) Which of the following does not react with AgCl? Show Answer

Q760) Which of the following is not correct? Show Answer

Q761) Which of the following equations is not correctly formulated? Show Answer

Q762) Laughing gas is prepared by heating Show Answer

Q763) A certain element forms a solid oxide which when dissolved in water forms an acidic solution. The element is: Show Answer

Q764) Which statement is not correct for nitrogen? Show Answer

Q765) The oxidizing property of nitric acid is due to: Show Answer

Q766) Which of the following acts as fluoro Lewis acids? Show Answer

Q767) The reaction showing endothermic nature and reduction of halogen is: Show Answer

Q768) A radioactive element X decays to give two inert gases. X is: Show Answer

Q769) Calcium carbide when heated with nitrogen forms: Show Answer

Q770) Hydrofluoric acid is not preserved in glass bottles because: Show Answer

Q771) Ammonia is: Show Answer

Q772) Schweitzer's reagent is: Show Answer

Q773) Sulphur on boiling with NaOH solution gives Show Answer

Q774) Which does not give oxygen on heating? Show Answer

Q775) Correct order of decreasing thermal stability is as Show Answer

Q776) Electronegativity of an inert gas is: Show Answer

Q777) Most electropositive halogen is: Show Answer

Q778) Good conductor of electricity is: Show Answer

Q779) Which of the following pairs is obtained on heating ammonium dichromate? Show Answer

Q780) Which of the following has S—S bond Show Answer

Q781) Which burns to form an oxide which is gas at room temperature? Show Answer

Q782) The crystals of ferrous sulphate on heating give: Show Answer

Q783) Helium was discovered by: Show Answer

Q784) The structure of orthophosphoric acid is Show Answer

Q785) Which one of the following reactions does not occur? Show Answer

Q786) Bleaching action of chlorine is due to: Show Answer

Q787) In clatherates of xenon with water, the nature of bonding between xenon and water molecule is Show Answer

Q788) Asthma patients use a mixture of…..for respiration. Show Answer

Q789) Which is an amphoteric oxide? Show Answer

Q790) Which requires catalyst? Show Answer

Q791) Anhydride of nitric acid is: Show Answer

Q792) Fluorine gas is stored in: Show Answer

Q793) Which of the following is used in very low temperature thermometers? Show Answer

Q794) Which of the following attacks glass: Show Answer

Q795) The noble gas forming maximum number of compound is Show Answer

Q796) Which property of white phosphorus is common to red P? Show Answer

Q797) Which one of the following statements is not true? Show Answer

Q798) Which one of the following pairs of substances when mixed, produces chlorine gas at room temperature? Show Answer

Q799) Which of the following elements is good conductor of electricity? Show Answer

Q800) Which of the following form of interhalogen compounds does not exists? Show Answer

Q801) Which one is true peroxide? Show Answer

Q802) When a colourless gas is passed through bromine water, decolourization takes place. The gas is: Show Answer

Q803) Which reaction is not feasible? Show Answer

Q804) The bonds present in pernitric acid are: Show Answer

Q805) In which of these processes platinum is used as a catalyst? Show Answer

Q806) A greenish yellow gas reacts with an alkali metal hydroxide to form a halate which can be used in fireworks and safety matches. The gas and halate respectively are: Show Answer

Q807) Correct statement about white phosphorus is: Show Answer

Q808) Ammonia reacts with excess of chlorine to form: Show Answer

Q809) The noble gas which can diffuse through rubber and glass easily is Show Answer

Q810) Sea-weeds are important sources of: Show Answer

Q811) CAN pellets are coated with calcium silicate because: Show Answer

Q812) Yellow phosphorus is kept in: Show Answer

Q813) When silver chloride dissolves in ammonia, it forms? Show Answer

Q814) Caro's acid is: Show Answer

Q815) Which one of the following has lowest bond dissociation energy? Show Answer

Q816) Ozone reacts with moist iodine giving: Show Answer

Q817) On heating sodium as well as sulphur can be melted. Molten sodium and molten sulphur are used as: Show Answer

Q818) Which of the following pairs has bleaching property? Show Answer

Q819) Which of the following is not a hydride? Show Answer

Q820) In froth floatation process for the purification of ores, the particles of ore float because Show Answer

Q821) The zero group members are collectively known as: Show Answer

Q822) Pnicogens are the elements of group? Show Answer

Q823) The percentage of available chlorine in a commercial sample of bleaching powder is: Show Answer

Q824) Which statement is false for ozone? Show Answer

Q825) Which oxide of chlorine is most powerful oxidizing agent? Show Answer

Q826) The electrolysis of brine solution to manufacture chlorine is carried out in the: Show Answer

Q827) The correct order of acidic strength is: Show Answer

Q828) Chlorous acid and its salts (chlorites) are: Show Answer

Q829) Antimony burns in chlorine to form: Show Answer

Q830) Ozone molecule has …….. geometry. Show Answer

Q831) Bromargyrite is a mineral of: Show Answer

Q832) Which is not true for ozone? Show Answer

Q833) Helium is used in gas balloons instead of hydrogen because: Show Answer

Q834) The oxidation states of phosphorus vary from: Show Answer

Q835) Which of the following is a mixed anhydride? Show Answer

Q836) The following elelment forms a molecule with eight of its own atoms Show Answer

Q837) Which does not give ammonia with water? Show Answer

Q838) Bond length is maximum in: Show Answer

Q839) The correct order of acidic nature of oxides is in the order Show Answer

Q840) Nitrogen molecule is chemically less active because it has a …… between two nitrogen atoms. Show Answer

Q841) Sulphur trioxide is dissolved in heavy water to form a compound X. The hydridisation of sulphur in X is Show Answer

Q842) Bleaching powder is mixed calcium salt of: Show Answer

Q843) Which noble gas does not form clathrates? Show Answer

Q844) Strongest reducing agent is: Show Answer

Q845) Bleaching properties of bleaching powder are due to its: Show Answer

Q846) One mole of calcium phosphide on reaction with excess water gives Show Answer

Q847) Most abundant element in earth's crust is: Show Answer

Q848) Which noble gas has the least tendency to form compounds? Show Answer

Q849) Which reaction yields the greatest quantity of chlorine from a given quantity of hydrochloric acid? Show Answer

Q850) Mixture used on tips of matchsticks is: Show Answer

Q851) Superphosphate of lime is Show Answer

Q852) In Birkeland and Eyde process, the temperature of the electric arc is about: Show Answer

Q853) Which element shows polymorphism? Show Answer

Q854) Select the correct statement. Show Answer

Q855) When Zn reacts with very dilute nitric acid it produces? Show Answer

Q856) Nitric acid is generally light yellow due to the presence of: Show Answer

Q857) The inert gases present in atmosphere are: Show Answer

Q858) Graham's salt is: Show Answer

Q859) Orthophosphoric acid is ionized in…….steps. Show Answer

Q860) Percentage of argon in air is about: Show Answer

Q861) Select the incorrect statement among the following Show Answer

Q862) Aqua fortis is: Show Answer

Q863) Which among the following is the strongest acid? Show Answer

Q864) Peroxy acids are Show Answer

Q865) The pale-yellow coloured gas is: Show Answer

Q866) What may be expected to happen, when phosphine gas is mixed with chlorine gas? Show Answer

Q867) Which of the following is a pseudohalogen? Show Answer

Q868) A substance X when heated with sulphuric acid liberates a gas which turns starch paper blue. The substance is: Show Answer

Q869) The formula of zinc phosphite is: Show Answer

Q870) How can you synthesise nitric oxide in the laboratory? Show Answer

Q871) Uranium isotopes are usually separated by using compounds of the halogen: Show Answer

Q872) By the action of concentrated hydrochloric acid on potassium chlorate we get this mixture of gases: Show Answer

Q873) For advertisement the coloured dischared tubes contain Show Answer

Q874) Ammonium salts are oxidized in the soil to nitrites by: Show Answer

Q875) Which reaction cannot be used for the preparation of the halogen acid? Show Answer

Q876) The principal source of helium is: Show Answer

Q877) Bleaching powder is a mixture of: Show Answer

Q878) Which gas is used to improve the atmosphere of crowded places? Show Answer

Q879) The chemical formula for tartar emetic is: Show Answer

Q880) Which is an essential trace element involved in physiology of thyroid glands? Show Answer

Q881) Iodine imparts brown colour to: Show Answer

Q882) Which coagulates white of an egg? Show Answer

Q883) Neon is extensively used in: Show Answer

Q884) The fluoride which does not exist is: Show Answer

Q885) Fluorine exhibits an oxidation state of only -1 because Show Answer

Q886) The solubility of iodine in water increases in presence of Show Answer

Q887) Sal volatile is: Show Answer

Q888) Which of the following is responsible for depletion of the ozone layer in the upper strata of atmosphere? Show Answer

Q889) Halogen acid used in the preparation of aqua regia is: Show Answer

Q890) Coloured oxide is nitrogen is: Show Answer

Q891) Bromine is liberated when an aqueous solution of KBr is treated with Show Answer

Q892) Which of the following is not a peroxy acid? Show Answer

Q893) Formation of ozonide is: Show Answer

Q894) Which reagent can separate nitric oxide from nitrous oxide? Show Answer

Q895) Which of the following is oxidised in air? Show Answer

Q896) Which statement is not correct? Show Answer

Q897) Which element does not form stable diatomic molecules? Show Answer

Q898) The anhydride of pyrosulphuric acid is: Show Answer

Q899) Ripening of fruits can be carried out in presence of Show Answer

Q900) Ozone oxidises moist sulphur to: Show Answer

Q901) Which is most thermodynamically stable allotropic form of phosphorus? Show Answer

Q902) Which one is strongest oxidizing agent? Show Answer

Q903) Dry bleaching is done by: Show Answer

Q904) Which is not an oxo-acid of chlorine? Show Answer

Q905) Which chemical contains chlorine? Show Answer

Q906) A greenish-yellow coloured gas is liberated on heating a mixture of two substances which are: Show Answer

Q907) What are the products obtained when ammonia is reacted with excess chlorine? Show Answer

Q908) The least stable anion of oxo-acids of chlorine is Show Answer

Q909) Non-combustible hydride is: Show Answer

Q910) In the known interhalogen compounds the maximum number of halogen atoms is: Show Answer

Q911) Which of the following is the life saving mixture for an asthma patient? Show Answer

Q912) Which species is not known? Show Answer

Q913) Which statement is wrong? Show Answer

Q914) Oxygen reacts with each of the following elements readily, except: Show Answer

Q915) Concentrated sulphuric acid can be reduced by Show Answer

Q916) Which form of P shows chemiluminescence? Show Answer

Q917) Phosgene is the name of: Show Answer

Q918) The idea which prompted Bartlett to prepare first ever compound of noble gas was: Show Answer

Q919) Correct order of electron affinities of halogens is Show Answer

Q920) The correct order of acidity of halogenic acids is Show Answer

Q921) Which of the following statements regarding sulphur is incorrect? Show Answer

Q922) Which of the following oxy-acids of phosphorus is a reducing agent and monobasic? Show Answer

Q923) Radon is a noble gas. Its radioactivity is used in the treatment of: Show Answer

Q924) On heating copper nitrate strongly ….. is finally obtained. Show Answer

Q925) Pearl white is: Show Answer

Q926) Which of the following dissolves in water but does not give any oxyacid solution? Show Answer

Q927) The nitrate which when heated gives-off a gas or a mixture of gases which cannot relight a glowing splinter is: Show Answer

Q928) Compounds formed when the noble gases get entrapped in the cavities of crystal lattices of certain organic and inorganic compounds are known as: Show Answer

Q929) The mineral clevite on heating gives: Show Answer

Q930) Bromine can be liberated from potassium bromide solution by: Show Answer

Q931) Which element is not considered as 'chalcogens'? Show Answer

Q932) When lead nitrate is heated it produces Show Answer

Q933) Which is the most easily liquefiable rare gas? Show Answer

Q934) The outermost electronic configuration of group 15 or VA elements is: Show Answer

Q935) The noble gas used in atomic reactor, is Show Answer

Q936) In modern process phosphorus is manufactured by: Show Answer

Q937) Which property is most important in making fluorine the strongest oxidising halogen? Show Answer

Q938) Which has maximum vapour pressure or most volatile or low b.p.? Show Answer

Q939) Which of the following halogen acids has the lowest melting point? Show Answer

Q940) Amphoteric oxide is: Show Answer

Q941) Bone black is polymorphic form of Show Answer

Q942) The lone pair present on N family hydrides more easily participates in bond formation in: Show Answer

Q943) Which element reacts with chlorine to give pentachloride? Show Answer

Q944) In which case, the order of acidic strength is not correct? Show Answer

Q945) Which compound does not has S—S bond? Show Answer

Q946) Compound of Sulphur used in electrical transformer is: Show Answer

Q947) The inert gases producing maximum number of compounds are Show Answer

Q948) The fertilizer named 'Nitrolim' is prepared by the use of: Show Answer

Q949) Noble gases are prepared by the: Show Answer

Q950) Sulphur trioxide can be obtained by which of the following reaction: Show Answer

Q951) When an aqueous solution of hypochlorite is heated: Show Answer

Q952) Xenon hexafluoride reacts with silica to form a xenon compound X. The oxidation state of xenon in X is Show Answer

Q953) The metallic form of phosphorus is: Show Answer

Q954) Sodium chromite is: Show Answer

Q955) Which one of the following reaction of xenon compounds is not feasible? Show Answer

Q956) Fixation of nitrogen means: Show Answer

Q957) A depolarizer used in dry batteries is: Show Answer

Q958) Liquor ammonia bottles are opened only after cooling because it has high vapour pressure and it is mild explosive. Show Answer

Q959) In oxo-acids of halogen, X = O bond is formed as a result of: Show Answer

Q960) Liquor ammonia is Show Answer

Q961) Which is the most volatile compound? Show Answer

Q962) Fuming nitric acid is: Show Answer

Q963) In ramsay and rayleigh's isolation of noble gases from air, the nitrogen of the air is finally converted into Show Answer

Q964) Superphosphate of lime is used in: Show Answer

Q965) Noble gases are: Show Answer

Q966) Nitric acid is used in the manufacture of : Show Answer

Q967) In halogen's group which elements has highest electron affinity? Show Answer

Q968) Which of the following is not obtained by direct reaction of constituent elements? Show Answer

Q969) The symbol Rn represent: Show Answer

Q970) Which halogens oxidises water to oxygen exothermally? Show Answer

Q971) The gas which is absorbed by ferrous sulphate solution giving blackish brown colour is: Show Answer

Q972) Ozone is used for purifying water because Show Answer

Q973) White phosphorus is Show Answer

Q974) In smoke screens calcium phosphide is used, because it: Show Answer

Q975) Nitrogen is a relatively inactive element because: Show Answer

Q976) Cold fire is related to Show Answer

Q977) Sides of match box have coating of Show Answer

Q978) The non-existent species is: Show Answer

Q979) The non-metallic element whose molecules contain maximum number of its atoms is: Show Answer

Q980) In Kroll and ICl process of the production of titanium, the inert gas used is: Show Answer

Q981) A positive chromyl chloride test is given by a salt containing: Show Answer

Q982) The following species will not exhibit disproportionation reaction Show Answer

Q983) Aqua-regia is Show Answer

Q984) Which halogen does not show bleaching property? Show Answer

Q985) Interhalogen compounds are more reactive than the individual halogen because: Show Answer

Q986) Arsine is: Show Answer

Q987) Which of the following isotopes is present in largest amount? Show Answer

Q988) Which has the highest molar heat of vaporization? Show Answer

Q989) Who observed helium first on the earth? Show Answer

Q990) Liquid ammonia is used for refrigeration because Show Answer

Q991) The number of different oxides of chlorine is: Show Answer

Q992) Boiling of dil. HCl acid does not increase its concentration beyond 20.24 per cent because hydrochloric acid: Show Answer

Q993) Concentrated hydrochloric acid when kept in open air sometimes produces a cloud of white fumes. The explanation for it is that: Show Answer

Q994) The gas which does not show oxidizing and bleaching properties is: Show Answer

Q995) Atomicity of phosphorus is: Show Answer

Q996) Ammonia is generally manufactured for fertilizers by the reaction: Show Answer

Q997) The group 15 or VA group elements are commonly known as: Show Answer

Q998) The M—Cl bond energies are different in: Show Answer

Q999) The oxidation of thiosulphate ion by iodine gives: Show Answer

Q1000) Which halide of nitrogen is least basic? Show Answer

Q1001) Most acidic oxide is: Show Answer

Q1002) King of chemicals is: Show Answer

Q1003) Fluorine is the best oxidising agent because it has Show Answer

Q1004) Which of the following compounds can not be stored in glass vessels? Show Answer

Q1005) Which bond has the greatest polarity? Show Answer

Q1006) Berthelot's salt is: Show Answer

Q1007) The strongest oxidizing agent among the following is: Show Answer

Q1008) Which is tribasic acid? Show Answer

Q1009) Which chloride is explosive? Show Answer

Q1010) All the elements of the oxygen family are: Show Answer

Q1011) As the number of —OH groups increases in hypophosphorus acid phosphorus acid and phosphoric acid the acidic strength Show Answer

Q1012) Nitric acid oxidizes sulphur to: Show Answer

Q1013) Which one is correct if HCl and HF are present together in liquid state? Show Answer

Q1014) Xenon tetrafluoride has hybridisation and structure as: Show Answer

Q1015) Red phosphorus is chemically unreactive because: Show Answer

Q1016) Which acid is not formed by the action of water on phosphorus pentoxide? Show Answer

Q1017) To make nitrogen dioxide free from oxygen it is passed through U-tube: Show Answer

Q1018) Tincture of iodine is: Show Answer

Q1019) Sulphur does not combine with which of the following halogens to form a compound? Show Answer

Q1020) Sulphurous anhydride is: Show Answer

Q1021) The percentage of ozone in ozonized oxygen is about: Show Answer

Q1022) The weakest acid among the following is: Show Answer

Q1023) Which is planar molecule? Show Answer

Q1024) White phosphorus may be separated from red phosphorus by: Show Answer

Q1025) What are the products formed in the reaction of xenon hexafluoride with silicon dioxide? Show Answer

Q1026) Mixture of sand and iodine can be separated by: Show Answer

Q1027) Ammonia is soluble in water because it is: Show Answer

Q1028) Sodium nitrate on heating with zinc dust and caustic soda gives: Show Answer

Q1029) Which one is least soluble in water? Show Answer

Q1030) Formula of iodine phosphate is: Show Answer

Q1031) Which of the following forms vortex ring? Show Answer

Q1032) When radioactive minerals like clevite, monazite and pitchblende are heated to 1273 k in vacuo the noble gas obtained is Show Answer

Q1033) Which acid on keeping for long time acquires brown colour? Show Answer

Q1034) Bacteria convert molecular nitrogen into: Show Answer

Q1035) Nitric acid (conc.) oxidizes phosphorus to: Show Answer

Q1036) Diamagnetic oxide of chlorine is: Show Answer

Q1037) Which of the following is the correct order of increasing enthalpy of vaporization? Show Answer

Q1038) The acidity of hydrides of O, S, Se, Te varies in the order Show Answer

Q1039) Which of the following was previously known as muriatic acid? Show Answer

Q1040) Which has the strongest bond? Show Answer

Q1041) When molten sulphur is suddenly cooled by pouring into water, it takes the form of Show Answer

Q1042) Which metal forms an amphoteric oxide? Show Answer

Q1043) Which of the following is anhydride of perchloric acid? Show Answer

Q1044) An element forms a gaseous oxide which on dissolving in water gives an acid solution. The element is: Show Answer

Q1045) When plants and animals decay the organic nitrogen is converted into inorganic nitrogen .The inorganic nitrogen in the form of Show Answer

Q1046) Minimum bond length will be in: Show Answer

Q1047) A certain compound when burnt gave three oxides. The first turned lime water milky, the second turned cobalt chloride paper pink and the third formed an aqueous solution of pH 3 nearly. The elements present in the compound are: Show Answer

Q1048) Anhydride of sulphuric acid is: Show Answer

Q1049) Which of the following has no action with starch solution? Show Answer

Q1050) The essential element of nitrogen fixation is: Show Answer

Q1051) Bleaching powder is an example of: Show Answer

Q1052) What may be expected to happen when phosphine gas is mixed with chlorine gas? Show Answer

Q1053) Iron sulphide is heated in air to form A. an oxide of sulphur. A is dissolved in water to give an acid. The basicity of this acid is…. Show Answer

Q1054) The compound that gives chorine like smell is: Show Answer

Q1055) When ammonia is dissolved in water: Show Answer

Q1056) Hyponitrous acid is: Show Answer

Q1057) Which of the following is planar? Show Answer

Q1058) Which oxide of N is neutral? Show Answer

Q1059) Ozone is manufactured by carrying silent electric discharge using: Show Answer

Q1060) Which forms new compound in air? Show Answer

Q1061) Which statement regarding He is incorrect? Show Answer

Q1062) Reactivity of NO is due to: Show Answer

Q1063) Which of the following statement is true? Show Answer

Q1064) Welding of magnesium can be done in an atmosphere of: Show Answer

Q1065) In which reaction there is no change in valency and the oxidation state? Show Answer

Q1066) When a lead storage battery is discharged: Show Answer

Q1067) The oxygen family is characterised by the electronic configuration: Show Answer

Q1068) Which one of the following noble gases is used in miner's cap lamps? Show Answer

Q1069) On heating silver nitrate strongly ……. is obtained finally: Show Answer

Q1070) Pure phosphine is not combustible while impure phosphine is combustible, this combustibility is due to the presence of: Show Answer

Q1071) Bleaching powder on standing forms mixture of: Show Answer

Q1072) Which statement is not correct? Show Answer

Q1073) Which acid can combine with its own salt again? Show Answer

Q1074) The number of electrons in a halogen in its outermost orbit in comparison with corresponding noble gas is: Show Answer

Q1075) The deep blue colour produced on adding excess of ammonia to copper sulphate solution is due to the presence of: Show Answer

Q1076) The solubility of noble gases in water shows the order: Show Answer

Q1077) Which of the following oxo-acids of chlorine is formed on shaking chlorine water with freshly precipitated yellow oxide of mercury? Show Answer

Q1078) Which of the element listed below occurs in allotropic forms? Show Answer

Q1079) Phosphorus is present in bones as: Show Answer

Q1080) Noble gases are adsorbed by: Show Answer

Q1081) Paramagnetic molecule is: Show Answer

Q1082) Which is a poison? Show Answer

Q1083) The element than oxidizes water to oxygen with evolution of heat is: Show Answer

Q1084) Which of the following compounds is not an "interpseudohalogen"? Show Answer

Q1085) Which of the following is a tribasic acid? Show Answer

Q1086) Presence of sulphide ion cannot be confirmed by: Show Answer

Q1087) Peroxy compound is: Show Answer

Q1088) T-shaped interhalogen compound is Show Answer

Q1089) Nitre cake is: Show Answer

Q1090) Helium is used in balloons in place of hydrogen because it is Show Answer

Q1091) The O—O bond length in ozone is: Show Answer

Q1092) The lightest, non-inflammable gas is: Show Answer

Q1093) The reaction in the Kipp's apparatus stops on closing the outlet, because: Show Answer

Q1094) Which of the following chloride is water insoluble? Show Answer

Q1095) Which radical can bring about the highest oxidation state of a transition metal? Show Answer

Q1096) Which of the following halogens can replace others form their salt solutions? Show Answer

Q1097) Metal reacts with Sulphur to give: Show Answer

Q1098) The non-metal other than graphite having metallic lustre is: Show Answer

Q1099) Ozone turns benzidine paper: Show Answer

Q1100) Which statement is incorrect? Show Answer

Q1101) The bond Br—Cl is: Show Answer

Q1102) Which element is extracted commercially by the electrolysis of an aqueous solutions of one of its compounds? Show Answer

Q1103) Which of the following gases exists more abundantly in nature than the others? Show Answer

Q1104) Which inert gas has the highest boiling point? Show Answer

Q1105) Ammonium dichromate is used in some fireworks. The green coloured powder blown is: Show Answer

Q1106) A gas, that relights glowing splinter, is Show Answer

Q1107) The acid which forms two series of salts: Show Answer

Q1108) Which among the following factors is the most important in making fluorine the strongest oxidizing agent? Show Answer

Q1109) The structure of white phosphorus is: Show Answer

Q1110) Halogens are: Show Answer

Q1111) Radon was discovered by: Show Answer

Q1112) The general formula of hypophosphorous acid is: Show Answer

Q1113) Ammonia on catalytic oxidation gives an oxide from which nitric acid is obtained. The oxide is: Show Answer

Q1114) Ammonia is dried over Show Answer

Q1115) The structural formula of hypophosphorus acid is Show Answer

Q1116) Which one of the following oxides of nitrogen dimerises into a colourless solid /liquid on cooling? Show Answer

Q1117) Which ion cannot be precipitated from water? Show Answer

Q1118) Ozone acts as: Show Answer

Q1119) Correct order of reactivity Show Answer

Q1120) When bleaching powder is treated with carbon dioxide: Show Answer

Q1121) Red P can be obtained by white P by Show Answer

Q1122) A solution of chlorine in water contains: Show Answer

Q1123) Helium gives a characteristic spectrum with: Show Answer

Q1124) Molecules of a noble gas do not posses virbrational energy because a noble gas Show Answer

Q1125) When chlorine is passed through concentrated solution of KOH, the compound formed is Show Answer

Q1126) Which of the following oxides of nitrogen is the anhydride of nitrous acid? Show Answer

Q1127) Halogen molecules are: Show Answer

Q1128) Least stable oxide of chlorine is Show Answer

Q1129) Bromine water is decolourised by: Show Answer

Q1130) Fluorine reacts with water to give Show Answer

Q1131) The electronic configurations of four elements are given below. Which element does not belong to the same family as others? Show Answer

Q1132) Among the noble gases, xenon reacts with fluorine to give stable xenon fluorides because Show Answer

Q1133) Which phosphorus reacts with KOH solution to produce phosphine gas? Show Answer

Q1134) In solid state of noble gases, the atoms are held together by: Show Answer

Q1135) In the treatment of leukaemia……… is used. Show Answer

Q1136) Among K, Ca, Fe and Zn , the element which can form more than one binary compound with chlorine is Show Answer

Q1137) Red P is used in making: Show Answer

Q1138) Phosphorus pentoxide is widely used as Show Answer

Q1139) Ozone with KI solution produces Show Answer

Q1140) Which are hydrolysed by water? Show Answer

Q1141) In order to prevent the hot metal filament from getting burnt, when the electric current is switched on, the bulb is filled with: Show Answer

Q1142) Weldon mud is: Show Answer

Q1143) Which of the following has—O—O—linkage? Show Answer

Q1144) Which is correct statement? Show Answer

Q1145) If two litre of air is passed repeatedly over heated copper and heated Mg till no further reduction in volume takes place, the volume finally obtained will be approximately: Show Answer

Q1146) The chemical used for cooling in refrigeration or in manufacture of ice is: Show Answer

Q1147) What products are expected from the disproportionation reaction of hypochlorous acid? Show Answer

Q1148) If an allotropic form changes slowly to a stable form. It is called Show Answer

Q1149) The noble gas which behaves abnormally in liquid state is Show Answer

Q1150) Smelling salt is: Show Answer

Q1151) Xenon best reacts with: Show Answer

Q1152) Sulphate ion has …… geometry. Show Answer

Q1153) Sulphur in + 3 oxidation state is present in Show Answer

Q1154) Which of the following is correct with reference to protonic acids? Show Answer

Q1155) A helium atom on losing an electron becomes Show Answer

Q1156) Concentrated nitric acid on heating decomposes to give: Show Answer

Q1157) Bromine is obtained on a commercial scale from: Show Answer

Q1158) Among the following, the basic oxide is Show Answer

Q1159) The blue coloured gas is: Show Answer

Q1160) The gas used in the manufacture of ice-cream is: Show Answer

Q1161) A white precipitate is obtained on hydrolysis of: Show Answer

Q1162) one gas bleaches the color of the flower by reduction while the other by oxidation.The gases are: Show Answer

Q1163) In a given sample of bleaching powder the percentage of available chlorine is 49. The volume of chlorine obtained if 10 g of the sample is treated with HCl at NTP is: Show Answer

Q1164) Which one has the highest percentage of nitrogen? Show Answer

Q1165) Which has maximum pH in aqueous solution? Show Answer

Q1166) Which of the following is not a drying and dehydrating agent? Show Answer

Q1167) Large deposits of sulphur in nature are found in the form of: Show Answer

Q1168) Which of the following does not exist? Show Answer

Q1169) In the upper layer of the atmosphere ozone is formed by the Show Answer

Q1170) The compound that attacks pyrex glass is: Show Answer

Q1171) Calcium phosphide is used in smoke screens because it Show Answer

Q1172) Gaseous HCl is a poor conductor of electricity, while its aqueous solution is a good conductor. This is because: Show Answer

Q1173) The inert gas obtain from the monozite sand is Show Answer

Q1174) Which of the following occurs in free state? Show Answer

Q1175) Oxygen exhibits positive oxidation state in Show Answer

Q1176) Which one is not an acid salt? Show Answer

Q1177) The poisson's ratio for inert gases is: Show Answer

Q1178) Oxygen is gas but sulphur is solid because: Show Answer

Q1179) The noble gas which is not found in atmosphere? Show Answer

Q1180) In contact process impurities of arsenic are removed by: Show Answer

Q1181) Concentrated sulphuric acid does not act as: Show Answer

Q1182) Which halogen does not react with water? Show Answer

Q1183) Which hydride is most acidic? Show Answer

Q1184) Which of the following cannot be formed? Show Answer

Q1185) The discovery of isotopes began with the experiments with: Show Answer

Q1186) In the oxo-acids of chlorine Cl—O bond contains: Show Answer

Q1187) Make the element which displaces three halogens from their compounds Show Answer

Q1188) Which of the following phosphorus is most stable? Show Answer

Q1189) Arsenic acid is: Show Answer

Q1190) The halogen that is most readily reduced is: Show Answer

Q1191) Ozone reacts with dry iodine to give: Show Answer

Q1192) Fluorine absorbs ….. portion of light and appears yellow. Show Answer

Q1193) Which of the element of nitrogen family produce maximum number of oxy-acids? Show Answer

Q1194) Halogens are placed in the VIIA group or gp. 17 of the periodic table, because: Show Answer

Q1195) Nitrosyl chloride is: Show Answer

Q1196) The substance used in smoke screen is Show Answer

Q1197) Which is cyclic phosphate? Show Answer

Q1198) Which possesses highest percentage of ionic character? Show Answer

Q1199) Elements O, S, Se and Te are usually known as: Show Answer

Q1200) Bleaching powder slowly loses its activity when it stands in air. This is due to: Show Answer

Q1201) Which statement is false? Show Answer

Q1202) Which of the following is more soluble in water? Show Answer

Q1203) The number of hydrogen atom (s) attached to phosphorus atom in hypophorus acid is? Show Answer

Q1204) Which of the following compound is tribasic acid? Show Answer

Q1205) Which one of the following cations does not form a complex with ammonia? Show Answer

Q1206) Nuclear fusion produces Show Answer

Q1207) Which of the following oxide does not form acidic aqueous solution? Show Answer

Q1208) Which possesses least stable covalent P—H bond? Show Answer

Q1209) Which one below is a pseudohalide? Show Answer

Q1210) The Nessler's reagent contains: Show Answer

Q1211)
Interhalogen compounds are: Show Answer

Q1212) Fluorine does not show positive oxidation states because: Show Answer

Q1213) The correct order of the thermal stability of hydrogen halides (H-X) is Show Answer

Q1214) Noble gases can be separated by: Show Answer

Q1215) The solubility of iodine in water is greatly increased by: Show Answer

Q1216) The catalyst used in the preparation of red P from yellow P is: Show Answer

Q1217) Which of the following statements is not valid for oxoacids of phosphorus? Show Answer

Q1218) Which statement is not true for astatine? Show Answer

Q1219) The only element in VIA group or group 16 elements, which is definitely a metal, is: Show Answer

Q1220) The gas used in gas thermometer is: Show Answer

Q1221) Which of the following acids does not attack Cu and Ag? Show Answer

Q1222) Number of isotopes of oxygen is: Show Answer

Q1223) Bromine vapour turns moist starch-iodide paper: Show Answer

Q1224) The brown yellow colour often shown by nitric acid can be removed by: Show Answer

Q1225) There is an ozone layer at a height of about 29 kilometres above the surface of the earth. Which of the following statements is true? Show Answer

Q1226) Deep sea divers used to respirate is a mixture of Show Answer

Q1227) Density of nitrogen gas prepared from air is slightly greater than that of nitrogen prepared by chemical reaction from a compound of nitrogen because aerial nitrogen contains: Show Answer

Q1228) Antichlor is a compound: Show Answer

Q1229) Which reacts rapidly with oxygen in the air at ordinary temperature? Show Answer

Q1230) The chief source of iodine in which it is present as sodium iodate is Show Answer

Q1231) As the atomic number of the halogens increases, the halogens: Show Answer

Q1232) An interhalogen compound is: Show Answer

Q1233) Phosphine is not collected in air because: Show Answer

Q1234) Bones glow in the dark, because: Show Answer

Q1235) Oxygen exhibits positive oxidation state with: Show Answer

Q1236) The atom larger in size as compared to oxygen is: Show Answer

Q1237) What is the oxidising agent chlorine water? Show Answer

Q1238) Which of the following halogens is solid at room temperature? Show Answer

Q1239) The anhydride of nitrous acid is: Show Answer

Q1240) Which of the following is strongest oxidizing agent? Show Answer

Q1241) Which sulphide is insoluble in yellow ammonium sulphide? Show Answer

Q1242) Which one is most basic in character? Show Answer

Q1243) Which oxide is alkaline? Show Answer

Q1244) Oleum is chemically Show Answer

Q1245) Among halogens maximum oxides are formed by: Show Answer

Q1246) Which statement is false? Show Answer

Q1247) Freons are used as: Show Answer

Q1248) Sulphur molecule exists as: Show Answer

Q1249) Noble gases are adsorbed by Show Answer

Q1250) Phosphorus when exposed to air burns spontaneously because: Show Answer

Q1251) Freons are: Show Answer

Q1252) Normality of pure sulphuric acid is: Show Answer

Q1253) A hydride of nitrogen which is acidic is Show Answer

Q1254) The highest ionization potential in a period is shown by: Show Answer

Q1255) The percentage of nitrogen in urea is about: Show Answer

Q1256) Phosphate mineral of phosphorus is: Show Answer

Q1257) Dithionic acid has the formula: Show Answer

Q1258) Among the following nitrates, lead nitrate, silver nitrate, sodium nitrate and ammonium nitrate; the one that decomposes without leaving any solid residue is Show Answer

Q1259) Ammonia and phosphine resemble each other in: Show Answer

Q1260) Tear gas is: Show Answer

Q1261) When ammonium chloride is heated with NaOH, a gas is evolved, which has Show Answer

Q1262) When phosphine is bubbled through solution of silver nitrate…..is precipitated. Show Answer

Q1263) Hydrolysis of one mole of peroxodisulphuric acid produces: Show Answer

Q1264) Which has the same electronic configuration as of inert gas? Show Answer

Q1265) Glacial phosphoric acid is: Show Answer

Q1266) Which of the following pairs is not correctly matched? Show Answer

Q1267) The number of hydrogen atom (s) attached to phosphorus atom in pyrophosphorus acid is Show Answer

Q1268) Which of the following is not correct? Show Answer