Practice Test

Q1) Petroleum is found Show Answer

Q2) The conversion of liquid hydrocarbon into a mixture of gaseous compounds by heat alone is known as Show Answer

Q3) Natural gas is a mixture of Show Answer

Q4) Petrol or gasoline used as an automobile fuel is a mixture of Show Answer

Q5) Out of the following fractions of petroleum the one having the lowest boiling point is Show Answer

Q6) Most of the hydrocarbons from petroleum are obtained by Show Answer

Q7) An ocatane number 100 is given to Show Answer

Q8) Tetraethyl lead is used as Show Answer

Q9) On cracking petrol we get Show Answer

Q10) The source of kerosene is Show Answer

Q11) Oil obtained from petroleum is called Show Answer

Q12) A knocking sound is produced more in the engine when the fuel contains mainly Show Answer

Q13) The gas believed to be the cause of explosion in coal-mines Show Answer

Q14) The synthesis gas is Show Answer

Q15) Octane number is Show Answer

Q16) The flash point in India is fixed at Show Answer

Q17) Octane number of 2,2,3-trimethylbutane has been assumed to be Show Answer

Q18) Which among the following are used as catalyst in cracking Show Answer

Q19) Indane is Show Answer

Q20) Which of the following is not a mixture of hydrocarbons Show Answer

Q21) Octane number is related to the petroleum product Show Answer

Q22) Which of the following is not a petroleum product. Show Answer

Q23) Gasoline has composition Show Answer

Q24) The tar which is used to make roads is a solid known as Show Answer

Q25) Cetane number of diesel fuel increases with the addition of Show Answer

Q26) Which of the following has highest octane number Show Answer

Q27) Octane number can be changed by Show Answer

Q28) The chemical added to leaded petrol to prevent the deposition of lead in the combustion chamber is : Show Answer

Q29) A fuel has the same knocking property as a mixture of 70% iso -octane (2,2, 4 - Trimethylpentane) and 30% n-heptane by volume. The octane number of the fuel is Show Answer

Q30) Which of the following substances is used as an antiknock compound Show Answer

Q31) Octane number is zero for Show Answer

Q32) Which one of the following has lowest octane number ? Show Answer

Q33) Marsh gas mainly contains Show Answer

Q34) Photochemical chlorination of alkaline is initiated by a process of Show Answer

Q35) Electrolysis of potassium acetate given Show Answer

Q36) The substance that would not at all be formed during the reaction of methane and chlorine in the presence of sunlight is Show Answer

Q37) Among the paraffins it is generally found that with an increase in the molecular weight Show Answer

Q38) Which reagent can be used to convert, halides, alcohols, carbonyl compounds, acids, etc., to alkane. Show Answer

Q39) Decarboxylation of isobutyric acid leads to Show Answer

Q40) The product obtained when methyl magnesium bromide reacts with methyl alcohol Show Answer

Q41) Hexachoroethane is also called Show Answer

Q42) Halogenation of alkanes is an example of Show Answer

Q43) The addition of oxygen gas to reaction mixture of chlorine and methane (photochemical chlorination) Show Answer

Q44) As compared to melting points even carbon chain isomers, the melting points of odd carbon chain alkanes are Show Answer

Q45) Methyl bromide heated with zinc in closed tube produces Show Answer

Q46) Paraffins dissolve in Show Answer

Q47) The most reactive alkane is Show Answer

Q48) During Wurtz reaction, which of the following is sometimes also obtained because of decomposition of free radicals Show Answer

Q49) Bromination of an alkane as compared to chlorination proceeds Show Answer

Q50) How many monochlorobutanes will be obtained on chlorination of n-butane ? Show Answer

Q51) Hydrocarbon which is liquid at room temperature is Show Answer

Q52) The chemicals and the reaction conditions required for the preparation of ethane are Show Answer

Q53) Which of the following method is most appropriate for the manufacture of methane ? Show Answer

Q54) Reaction of alkanes with halogens is explosive in case of Show Answer

Q55) When an aqueous solution containing sodium acetate and sodium propionate is electrolysed we get Show Answer

Q56) On treating a mixture of two alkyl halides with sodium metal in dry ether, 2-methylpropane was obtained. The alkyl halides are Show Answer

Q57) The most stable free radical among the following is Show Answer

Q58) The order of reactivity of halogens in aliphatic substitution reactions is Show Answer

Q59) In Wurtz reaction the reagent used is Show Answer

Q60) Pure methane can be produced by Show Answer

Q61) On mixing certain alkane with chlorine and irradiating it with ultraviolet light, it forms only one monochloroalkane. The alkane is Show Answer

Q62) Which one of the following is reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon ? Show Answer

Q63) The highest boiling point is expected for Show Answer

Q64) A mixture of ethyl iodide and n-porpyl iodide is subjected to Wurtz reaction. The hydrocarbon which will not be formed is Show Answer

Q65) What would be the product formed when 1-Bromo-3-chlorocyclobutane reacts with two equivalents of metallic sodium in ether ? Show Answer

Q66) 2-Methylbutane on reaction with bromine in the presence of sunlight gives mainly Show Answer

Q67) Ethylene can be prepared by electrolysis of an aqueous solution of Show Answer

Q68) Propene on reaction with methylene iodide in presence of Zn - Cu couple gives Show Answer

Q69) The alkene which on ozonolysis yields acetone only is Show Answer

Q70) An alkene, obtained by the dehydration of an alcohol, (A), on ozonolysis gives two molecules of acetaldehyde for every molecule of alkene. The alcohol (A) is Show Answer

Q71) Ethylene forms ethylene chorohydrin by the action of Show Answer

Q72) The type of isomerism not exhibited by alkenes is Show Answer

Q73) Addition of ICI on propene gives the product Show Answer

Q74) Ethylene reacts with sulphur monochloride to give Show Answer

Q75) The reaction of ethene with oxygen in presence of a silver catalyst gives Show Answer

Q76) Addition of halogen acid occurs at slowest rate in Show Answer

Q77) Propene on reaction with diazomethane in presence of UV radiations gives Show Answer

Q78) The presence of unsaturation in organic compounds can be tested with Show Answer

Q79) Propane-1-ol can be prepared from propene by Show Answer

Q80) A hydrocarbon reacts with hyochlorous acid to give 2-choroethanol. The hydrocarbon is Show Answer

Q81) Which one of the following heptanols can be dehydrated to hept-3-ene only ? Show Answer

Q82) Hydrolosis of ozonide of but-l-ene gives Show Answer

Q83) Pent-1-ene with HCl gives Show Answer

Q84) The product formed by the action of chlorine on ethene in saturated solution of KBr is/are Show Answer

Q85) Addition of Hl on double bond of propene yields iso-propyl iodide as major product. It is because the addition proceeds through Show Answer

Q86) For preparing an alkane, a concentrated aqueous solution of sodium or potassium salt of saturated carboxylic acid is subjected to Show Answer

Q87) Lewsite is : Show Answer

Q88) The conversation of 2,3-dibromobutane to 2-butene with Zn is Show Answer

Q89) Which doesn't follow Markownikoff's rule ? Show Answer

Q90) Dehydrohalogenation in presence of OH is correctly represented by Show Answer

Q91) Which of the following requires free radical intermediates ? Show Answer

Q92) Which of the following does not show geometrical isomerism ? Show Answer

Q93) Among the following compounds which can be dehydrated very eaisly is Show Answer

Q94) Acid catalysed hydration of alkenes except ethene leads to the formation of Show Answer

Q95) Anti-Markownikoff's addition of HBr is not observed in Show Answer

Q96) Baeyer's reagent is Show Answer

Q97) 1-Chlorobutane on reaction with alcoholic potash gives Show Answer

Q98) Ozonolysis of 2,3-dimethyl-1butene followed by reduction with zinc and water gives Show Answer

Q99) In the presence of peroxide, hydrogen chloride and hydrogen iodide do not give anti Markownikoff's addition to alkenes because Show Answer

Q100) The reaction of propene with HOCl proceeds via the addition of Show Answer

Q101) The best method to perpare cyclohexene from cyclohexanol is by using Show Answer

Q102) Which of the following reactions is shown by alkynes Show Answer

Q103) Number of acidic hydrogen atom in
but-1-yne- is Show Answer

Q104) By the action of hydrobromic acid on ethyne we get Show Answer

Q105) Acetylene is prepared industrially by passing electric discharge through graphite electrodes in the atmosphere of Show Answer

Q106) Acetylene can be converted to higher alkynes using the following sequence of reaction Show Answer

Q107) Acetylenic hydrocarbons are acidic because Show Answer

Q108) An anaesthetic naracylene is commercial name of Show Answer

Q109) The gas which is used for artificial ripening of fruits is Show Answer

Q110) The compound formed when silver powder is heated with chloroform Show Answer

Q111) Acetylene gives Show Answer

Q112) Tetrabromoethane on treatment with Zn gives Show Answer

Q113) What is formed when calcium carbide reacts with heavy water Show Answer

Q114) When acetylene is treated with HBr, the product is Show Answer

Q115) In acetylene molecule, the two carbon atoms are linked by Show Answer

Q116) Catalyst used in dimerisation of acetylene to prepare chloroprene is Show Answer

Q117) Which of the following gives propyne on hydrolysis ? Show Answer

Q118) In its reaction with silver nitrate acetylene shows Show Answer

Q119) Which one of these will not react with acetylene ? Show Answer

Q120) What is the product formed when acetylene reacts with hypochlorous acid ? Show Answer

Q121) Identify the reagent from the following list which can easily distinguish between 1-butyne and 2-butyne Show Answer

Q122) Which of the following species is most stable ? Show Answer

Q123) Which of the following in an explosive ? Show Answer

Q124) Among the following statements on the nitration of aromatic compounds, the false one is Show Answer

Q125) Which among the following is the strongest ortho-para directing group ? Show Answer

Q126) The correct order of reactivity towards electrophilic substitution is Show Answer

Q127) The correct sequence of activating power of a group in benzene is Show Answer

Q128) Among the following groups, which deactivates benzene ring for electrophilic substitution ? Show Answer

Q129) In Etard's reaction toluene is oxidised to benzaldehyde using Show Answer

Q130) Benzene is converted to toluene by Show Answer

Q131) In the halogenation of aromatic nucleus, the halogen carrier, is used to generate the species Show Answer

Q132) In nitrating mixture concentrated sulphuric acid is used Show Answer

Q133) The nitro group in nitrobenzene is Show Answer

Q134) The number of double bonds in BHC (gammexane) is Show Answer

Q135) Benzene easily shows Show Answer

Q136) Anhydrous aluminium chloride is used in Friedel Crafts reaction because it is Show Answer

Q137) Which of the following is used in Friedel Crafts acylation reaction ? Show Answer

Q138) When benzene is treated with CO and HCl in presence of anhydrous aluminium chloride, benzaldehyde is formed. This reaction is known as Show Answer

Q139) Benzene is formed by the electrolysis of Show Answer

Q140) In Friedel Crafts reaction benzene is Show Answer

Q141) Which of the following conditions are suitable for preparing benzyl chloride from toluene Show Answer

Q142) Which group is meta directing Show Answer

Q143) Ozonolysis of benzene gives Show Answer

Q144) Friedel Crafts reaction is not possible in Show Answer

Q145) Which of the following compounds reacts slower than benzene in electrophilic bromination. Show Answer

Q146) Which can be used for carrying out electrophilic aromatic substitution Show Answer

Q147) Benzene is obtained by Show Answer

Q148) Most common reactions of benzene and its derivatives are Show Answer

Q149) Which of the following can not be used in Friedel Crafts reactions ? Show Answer

Q150) The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I), benzenes (II) and nitobenzene (III) is Show Answer

Q151) What is the end product of nitration of toluene ? Show Answer

Q152) Which of the following possesses the highest melting point ? Show Answer

Q153) Benzene is obtained by fractional distillation of Show Answer

Q154) The treatment of benzene with isobutene in the presence of sulphuric acid gives Show Answer

Q155) The most reactive among the following towards sulphonation is Show Answer

Q156) Which of the following species participate in sulphonation of benzene ring ? Show Answer

Q157) Which one of these is not compatible with arenes ? Show Answer

Q158) The compound prepared by a substitution reaction of benzene is Show Answer

Q159) Gammexane is Show Answer

Q160) Heating a mixture of sodium benzoate and soda lime gives Show Answer

Q161) Benzene does not undergo addition reaction easily because Show Answer

Q162) The bond order of individual carbon-carbon bonds in benzene is Show Answer

Q163) Baeyar's reagent is Show Answer

Q164) Lindane can be obtained by reaction of benzene with Show Answer

Q165) Which of the following will be easily nitrated ? Show Answer

Q166) In catalytic reduction of hydrocarbons which catalyst is mostly used Show Answer

Q167) Position of double bond in alkenes can be identified by Show Answer

Q168) Propane cannot be prepared from which reaction ? Show Answer

Q169) Which of the following compounds are not arrange in order of decreasing reactivity towards electrophilic substitution ? Show Answer

Q170) Toluene on reaction with chlorine in presence of sunlight gives Show Answer

Q171) Which of the following compound will give only acetaldehyde after ozonolysis ? Show Answer

Q172) Which is most sensitive towards addition reaction? Show Answer

Q173) On monochlorination of 2-methylbutane the total number of chiral compounds formed is Show Answer

Q174) When phenyl magnesiumbromide reacts with t-butanol, the product would be Show Answer

Q175) The number of stereoisomers obtained by bromination of trans - 2 butene is Show Answer

Q176) Of the five isomeric hexanes, the isomer which can give can two monochlorinated compound is Show Answer

Q177) Which of the following reactions will yield 2,2 -dibromopropane ? Show Answer

Q178) The hydrocarbon which can react with sodium in liquid ammonia is Show Answer

Q179) Which of the following is not a petroleum product? Show Answer

Q180) A knocking sound is produced more in the engine when the fuel contains mainly: Show Answer

Q181) Reaction of HBr with propene in presence of peroxides gives: Show Answer

Q182) The reaction conditions used for converting 1,2-dibromopropane to propylene are Show Answer

Q183) The relationship between acetylene and benzene is comparable to the relationship between propyne and Show Answer

Q184) The ozonolysis of ethylene, acetylene and propylene respectively gives: Show Answer

Q185) Alkyl halides react with dialkyl copper reagents to give Show Answer

Q186) The gas which is used for the artificial ripening of fruits is: Show Answer

Q187) Which of the following is produced when coal is subjected to destructive distillation? Show Answer

Q188) Methyl bromide heated with zinc in closed tube produces: Show Answer

Q189) The reaction of alkanes with halogen is explosive in the case of: Show Answer

Q190) Which of the following is unsymmetrical alkene? Show Answer

Q191) Which of the statement is wrong for alkanes? Show Answer

Q192) Propane cannot be prepared from which reaction? Show Answer

Q193) Nitrating mixture is Show Answer

Q194) Which of the following is not a mixture of hydrocarbons? Show Answer

Q195) Which of the following has the maximum heat of hydrogenation? Show Answer

Q196) Position of double bond in alkenes is identified by Show Answer

Q197) Which of the following reagent can distinguish between 1-butyne and 2-butyne? Show Answer

Q198) Reaction of HBr with propene in the presence of peroxide gives Show Answer

Q199) The middle oil fraction of coal-tar distillation contains: Show Answer

Q200) Acrylic emulsion in paints is a polymer of: Show Answer

Q201) An anaesthetic narcylene is commercial name of: Show Answer

Q202) What volume of methane (NTP) is formed from 8.2 g of sodium acetate by fusion with sodalime? Show Answer

Q203) When methyl iodide is treated with sodium in ethereal solution, it gives Show Answer

Q204) 2-methylpentene 2 on ozonolysis will give: Show Answer

Q205) 2-Hexyne gives trans-2-hexene on treatment with: Show Answer

Q206) Which of the following will give three mono-bromo derivatives? Show Answer

Q207) In a reaction if half of the double bond is broken and two new bonds are formed, this is a case of: Show Answer

Q208) Which represents a cyclic alkane? Show Answer

Q209) According to Huckel's rule an aromatic compound must possess Show Answer

Q210) Acetylene gives: Show Answer

Q211) 1,1,2,2-tetrabromoethane on heating with Zn powder in alcohol finally gives: Show Answer

Q212) The carbide which reacts with water to form ethyne is Show Answer

Q213) Which statement is not correct in case of ethane? Show Answer

Q214) When ethyl chloride and alcoholic KOH are heated, the compound obtained is Show Answer

Q215) Which of the following will react with sodium metal? Show Answer

Q216) When the boiling point of the first ten normal alkanes are plotted, the graph looks like: Show Answer

Q217) Which is generally used as reducing agent in organic chemistry? Show Answer

Q218) Alkynes can be reduced to alkenes by hydrogenation in presence of: Show Answer

Q219) Which reagent distinguishes ethylene from acetylene? Show Answer

Q220) By heating tetraethyl ammonium hydroxide, the product formed are: Show Answer

Q221) Addition of ICl on propene gives the product: Show Answer

Q222) Which of the following alkenes gives on acetaldehyde on ozonolysis? Show Answer

Q223) Direct fluorination of alkanes is not made because: Show Answer

Q224) On monochlorination of n-pentane, the number of isomers formed is: Show Answer

Q225) Which of the following is the predominant product in the reaction of HOBr with propene? Show Answer

Q226) Acetylene is prepared industrially by passing electric discharge through graphite electrodes in the atmosphere of: Show Answer

Q227) The reaction of an aromatic halogen compound with an alkyl halide in presence of sodium in ether is called Show Answer

Q228) How many isomeric forms of pentane exist? Show Answer

Q229) Alkanes mainly show reactions involving: Show Answer

Q230) Ozonolysis of an organic compound A produces acetone and propionaldehyde in equimolar mixture. Identify A from the following compounds. Show Answer

Q231) The compound that is most reactive towards electrophilic nitration is Show Answer

Q232) One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is Show Answer

Q233) The conversion of propene to propanol is … type of reaction. Show Answer

Q234) An alkane of mol. weight 72 gives on monochlorination only one product. Name the alkane: Show Answer

Q235) The number of disubstituted products of benzene is Show Answer

Q236) Electrolysis of an aqueous solution of sodium acetate, yields Show Answer

Q237) Propyne on passing through red hot copper tube forms Show Answer

Q238) Among the following, the compound that be most readily sulphonated is Show Answer

Q239) Propylene on hydrolysis with sulphuric acid forms Show Answer

Q240) What is the product formed when acetylene reacts with hypochlorous acid? Show Answer

Q241) Alkenes undergo Show Answer

Q242) Polymer of propyen is: Show Answer

Q243) Which of the following has the least octane number? Show Answer

Q244) The tar which is used to make roads is a solid known as: Show Answer

Q245) Thermal decomposition of alkanes in the absence of air is called Show Answer

Q246) The conditions for aromaticity is Show Answer

Q247) When butane-1 is mixed with excess of bromine, the expected reaction product is: Show Answer

Q248) Propene on reaction with diazomethane in presence of UV radiations gives: Show Answer

Q249) Both methane and ethane may be obtained by a suitable one-step reaction from Show Answer

Q250) Iodination of alkane is made in presence of: Show Answer

Q251) Pick out the wrong statement. Show Answer

Q252) A hydrocarbon reacts with hypochlorous acid to give 2-chloroethanol. The hydrocarbon is: Show Answer

Q253) The angle strain in cyclobutane is Show Answer

Q254) Aromatization of n-heptane and n-octane gives respectively: Show Answer

Q255) Which of the following organic compounds exhibit acidic character? Show Answer

Q256) Sodium formate on heating with soda lime gives: Show Answer

Q257) Which of the following can be used for preparation of propane? Show Answer

Q258) The marsh gas detector used by miners works on the principle of: Show Answer

Q259) The compound with highest boiling point. Show Answer

Q260) The most stable conformation of chlorocyclohexane at room temperature is: Show Answer

Q261) Acetylene is not used in making: Show Answer

Q262) That acetylene is a linear molecule is shown by Show Answer

Q263) Which of the following differs with the other three? Show Answer

Q264) Which of the following reactions will yield, 2, 2-dibromopropane? Show Answer

Q265) Which one of the following can distinguish propyne from propene? Show Answer

Q266) The reaction of ethene with oxygen in presence of a silver catalyst gives: Show Answer

Q267) Which of the following is Wurtz-Fittig reaction? Show Answer

Q268) Ozonolysis can be used to detect: Show Answer

Q269) In which of the following will Kharasch effect operate? Show Answer

Q270) A lead compound known as….is used as anti-knock in petroleum industry to increase the efficiency of fuel consumption Show Answer

Q271) Which of the following form alkynide? Show Answer

Q272) Which of the following reagents when heated with ethyl chloride, forms ethylene? Show Answer

Q273) Reduction of 2-methyl-1-bromopropane with metal and acid gives: Show Answer

Q274) Dehydration of 2-butanol yield Show Answer

Q275) Which statement is correct? Show Answer

Q276) Which of the following reagents will be able to distinguish between 1-butyne and 2-butyne? Show Answer

Q277) 2-chloro-3-methylbutane is treated with sodium in etherial solution, then it will give Show Answer

Q278) Which of the following is incorrect? The members of the homologous series of alkanes? Show Answer

Q279) Ammoniacal cuprous chloride will give red precipitate with which one of the following? Show Answer

Q280) Mustard gas is: Show Answer

Q281) The structural formula of the compound which yields ethylene upon reaction with zinc: Show Answer

Q282) An alkyne combines with a conjugated diene to give an unconjugated cycloalkadiene. The most likely title of this reaction is Show Answer

Q283) The most important method of preparation of hydrocarbons of lower carbon number is: Show Answer

Q284) The number of carbon atoms in hydrocarbons of kerosene is in the range of: Show Answer

Q285) A mixture of 1-chlorobutane and 2-chlorobutane when treated with alcoholic KOH gives Show Answer

Q286) An octane number 100 is given to: Show Answer

Q287) When butene-1 is mixed with HBr, the major reaction product is: Show Answer

Q288) The order of appearance of the following with rising temperature during the refining of crude oil is: Show Answer

Q289) Cetane number of diesel fuel increases with the addition of: Show Answer

Q290) Distillation of acetone with concentrated sulphuric acid gives Show Answer

Q291) Soda lime is used extensively in decarboxylation reaction to obtain alkanes. Soda lime is: Show Answer

Q292) Incomplete combustion of petrol or diesel oil in automobile engines can be best detected by testing fuel gases for the presence of: Show Answer

Q293) Mustard gas is a Show Answer

Q294) Which of the following is not true? Show Answer

Q295) Action of RMg X with vinyl chloride gives: Show Answer

Q296) Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide? Show Answer

Q297) A meta directing functional group is Show Answer

Q298) Which one of the following compounds is prepared in the laboratory from benzene by a substitution reaction? Show Answer

Q299) Only two isomeric monochloro derivatives are possible for: Show Answer

Q300) Butene-1 may be converted to butane by reaction with Show Answer

Q301) The reaction of toluene with chlorine in presence of ferric chloride gives predominantly Show Answer

Q302) During Wurtz reaction, which of the following is sometimes also obtained because of decomposition of free radicals? Show Answer

Q303) Decarboxylation of malonic acid gives: Show Answer

Q304) Reactivity of tertiary H, secondary H and primary H towards elimination is: Show Answer

Q305) 1-butyne on hydration gives Show Answer

Q306) The most reactive halogen in the halogenation of alkanes is: Show Answer

Q307) Indane is: Show Answer

Q308) Which of the following cycloalkane gives open chain compound, when reacts with bromine? Show Answer

Q309) The addition of HBr to an alkene in the presence of peroxide is the example of Show Answer

Q310) On mixing a certain alkane with chlorine and irradiating it with UV light, it form one monochloro alkane. The alkane could be Show Answer

Q311) Which of the following statements is true for ethane, ethene and acetylene? Show Answer

Q312) On cracking petrol we get: Show Answer

Q313) Methyl bromide is converted into ethane by heating it in ether medium with Show Answer

Q314) The addition of oxygen gas to reaction mixture of chlorine and methane (photochemical chlorination): Show Answer

Q315) Bacterial decomposition of cellulose material present in sewage water gives: Show Answer

Q316) Meso-dibromobutane on debromination gives Show Answer

Q317) Kolbe's synthesis of sodium salt of butanoic acid gives: Show Answer

Q318) The compound formed when silver powder is heated with chloroform: Show Answer

Q319) The reaction of toluene with chlorine in the presence of ferric chloride gives predominantly Show Answer

Q320) Which of the following will yield trans product from butyne? Show Answer

Q321) When sodium propionate is heated with soda-lime, the product formed is Show Answer

Q322) Isopropyl bromide on Wurtz reaction gives Show Answer

Q323) Which one of the following has the minimum boiling point? Show Answer

Q324) The substance that would not at all be formed during the reaction of methane and chlorine in the presence of sunlight is: Show Answer

Q325) When isopropyl magnesium iodide is treated with water, the product is: Show Answer

Q326) Propyne on passing through red hot iron tube gives Show Answer

Q327) n-hexadecane (cetane) has cetane number: Show Answer

Q328) Acetylene does not react with Show Answer

Q329) What is the molecular formula of the product formed when benzene is reacted with ethyl chloride in presence of anhydrous aluminium chloride? Show Answer

Q330) A dibromo derivative of an alkane reacts with sodium metal to form an alicyclic hydrocarbon. The derivative is Show Answer

Q331) By coaltar distillation which is not obtained? Show Answer

Q332) The treatment of ethane with cold alkaline potassium permanganate produces Show Answer

Q333) As compared to melting points of even carbon chain isomers, the melting points of odd carbon chain alkanes are: Show Answer

Q334) Choose the correct statement Show Answer

Q335) 2-hexyne can be converted to trans-2-hexene by the action of: Show Answer

Q336) Which of the following will not produce ethane? Show Answer

Q337) Which will not react with acetylene? Show Answer

Q338) Ozonolysis of an organic compounds gives formaldehyde as one of the products. This confirms the presence of Show Answer

Q339) Among the paraffins it is generally found that with an increase in the molecular weight: Show Answer

Q340) Which of the following reactions can be used to prepare methane? Show Answer

Q341) Household gas or liquefied petroleum gas (L.P.G.) mainly contains: Show Answer

Q342) Which one of the following gives, on ozonolysis, both aldehydes and ketones? Show Answer

Q343) Which among the following give alkanes on reduction? Show Answer

Q344) Lewisite (a war gas) is an…….compound Show Answer

Q345) Butyne-1 and butyne-2 can be distinguished by: Show Answer

Q346) An isolated alkadiene is: Show Answer

Q347) If a halogen compound contains OH group, will it be possible to carry out the Wurtz reaction? Show Answer

Q348) Phenyl magnesium bromide reacts with methanol to give Show Answer

Q349) Iso-octane is added to petrol: Show Answer

Q350) When cyclohexane is poured on water, it floats, because: Show Answer

Q351) Which of these will not react with acetylene? Show Answer

Q352) The catalytic hydrogenation is more easier in case of which alkene? Show Answer

Q353) Addition of hydrogen on C=C is called hydrogenation. Addition of halogen on C=C is called: Show Answer

Q354) The synthetic gas is: Show Answer

Q355) Gem dihalides on treatment with alcoholic KOH give Show Answer

Q356) Acetylene and HCHO react in presence of copper acetylide catalyst to form Show Answer

Q357) Decarboxylation of isobutyric acid leads to: Show Answer

Q358) In the addition of HBr to propene in the absence of peroxides the first step involves the addition of: Show Answer

Q359) When a mixture of methane and oxygen is passed through heated molybdenum oxide, the main product formed is Show Answer

Q360) Propyne and propene can be distinguished by Show Answer

Q361) Conformation in molecules is due to: Show Answer

Q362) The non-aromatic compound among the following is Show Answer

Q363) Kerosene is a mixture of: Show Answer

Q364) Which of the following alkenes is most stable? Show Answer

Q365) What is obtained when chlorine is passed in boiling toluene and product is hydrolysed? Show Answer

Q366) It is necessary to use…..in the iodination of alkane. Show Answer

Q367) Ozonolysis of propyne gives: Show Answer

Q368) Reactivity of alkenes towards HX decreases in the order: Show Answer

Q369) 2-methylbutane on reacting with bromine in the presence of sunlight gives mainly Show Answer

Q370) Which statement is correct? Show Answer

Q371) An activating group Show Answer

Q372) An alkyl bromide, RBr of molecular weight 151 is the exclusive product of bromination of which hydrocarbon? Show Answer

Q373) The conversion of liquid hydrocarbon into a mixture of gaseous compounds by heat alone is known as: Show Answer

Q374) Ethyl benzene cannot be prepared by Show Answer

Q375) Silver acetylide when heated with HCl gives: Show Answer

Q376) The addition of HCl to 3, 3, 3-trichloropropene gives Show Answer

Q377) Sodium ethoxide is specific reagent for: Show Answer

Q378) A fuel contains 25% n -heptane and 75% iso-octane. Its octane number is: Show Answer

Q379) The greatest strain is involved in cycloalkane, when the bond angle is: Show Answer

Q380) Which of the following will be obtained by the bromination of ethylbenzene in the presence of light? Show Answer

Q381) Ethylene is used in making: Show Answer

Q382) The main constituent of light oil fraction is: Show Answer

Q383) The major product in the acid catalysed dehydration of 2-pentanol is: Show Answer

Q384) Which gas is commonly used in welding? Show Answer

Q385) The synthesis of 3-octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne. The bromoalkane and alkyne respectively are Show Answer

Q386) Which is most acidic of the following? Show Answer

Q387) Addition of HI on double bond of propene yields isopropyl iodide and not n-propyl iodide as the major product, because addition proceeds through: Show Answer

Q388) Correct statement about 1,3-dibutene Show Answer

Q389) Preparation of ethane by electrolysis of aqueous solution of potassium acetate is called Show Answer

Q390) Dehydrohalogenation of 1,2-dibromobutane with alc. KOH gives: Show Answer

Q391) Water can be added across a triple bond in the presence of Show Answer

Q392) Both methane and ethane may be obtained in one step reaction from: Show Answer

Q393) The product formed when acetylene is passed through red hot tube is: Show Answer

Q394) Among the following statement on the nitration of aromatic compounds, the false one is Show Answer

Q395) Which of the following compound is aromatic? Show Answer

Q396) To prepare a pure sample of n-hexane using sodium metal as one reactant, the other reactant or reactants
will be: Show Answer

Q397) Photochemical chlorination of alkane is initiated by a process of: Show Answer

Q398) The electrolysis of aqueous solution of potassium succinate produces Show Answer

Q399) The gas believed to be the cause of explosion in coal-mines or fire damp is: Show Answer

Q400) Addition of HBr to propylene in presence of benzoyl peroxide, follows Show Answer

Q401) 2-phenyl propene on acidic hydration gives, Show Answer

Q402) Halogenation of alkanes is an example of: Show Answer

Q403) The most stable isomer of 1,2-dichloroethane is: Show Answer

Q404) Grignard's reagent gives alkane with: Show Answer

Q405) The carbon-carbon bond length in benzene is Show Answer

Q406) Electrolysis of a concentrated solution of sodium fumarate gives: Show Answer

Q407) In order to overcome angle strain, cyclohexane acquires: Show Answer

Q408) Ethane can be freed (isolated) from the impurity of ethylene by washing with: Show Answer

Q409) Poisonous gases are: Show Answer

Q410) A chlorohydrocarbon, named chlorodane is used especially as: Show Answer

Q411) The addition of tetraethyl lead of petrol: Show Answer

Q412) Which of the following reactions will give an alkyne? Show Answer

Q413) Which one among the following is assigned an octane number of zero? Show Answer

Q414) The process where straight run gasoline is cracked in order to increase octane number is called: Show Answer

Q415) The treatment of aluminum carbide with water or dilute acid produces Show Answer

Q416) When acetylene is passed through red hot iron tube, compound X is formed. Which one of the following reactions will yield X as the major product? Show Answer

Q417) The major product formed when a 3, 3-dimethyl butan-2-ol is heated with concentrated sulphuric acid, is Show Answer

Q418) Most of the hydrocarbons from petroleum are obtained by: Show Answer

Q419) Cyclopentadienyl anion is Show Answer

Q420) Ozonolysis of buta-1,3-diene gives: Show Answer

Q421) Which is not true in the case of natural gas? Show Answer

Q422) Wurtz reaction using bromoethane yields: Show Answer

Q423) Which of the following compounds is not aromatic? Show Answer

Q424) Chlorination of toluene in the presence of light and heat followed by treatment with aqueous NaOH solution gives Show Answer

Q425) Toluene can be converted into benzaldehyde by oxidation with Show Answer

Q426) The reagent used for dehydration is: Show Answer

Q427) Formation of alkane by the action of zinc on alkyl halide is called Show Answer

Q428) Temperature of oxyacetylene flame is: Show Answer

Q429) Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y are respectively Show Answer

Q430) Hydrocarbon reacts with metal by displacing the H-atom is: Show Answer

Q431) Petroleum is a mixture of: Show Answer

Q432) The reduction of an alkyne to alkene using Lindlar catalyst result into Show Answer

Q433) Which molecule will undergo radical formation oxidation reaction most readily? Show Answer

Q434) Which of the following is expected to be aromatic? Show Answer

Q435) Aniline is treated with a mixture of sodium nitrite and hypophosphorus acid, the product formed is Show Answer

Q436) Hexachloroethane is also called Show Answer

Q437) In presence of nickel cyanide, acetylene gives Show Answer

Q438) Conjugated double bonds are present in: Show Answer

Q439) Normal alkanes can undergo sulphonation if they contain: Show Answer

Q440) The dehydrohalogenation of neopentyl bromide with alcoholic KOH gives mostly: Show Answer

Q441) Which of the following liberates methane on treatment with water? Show Answer

Q442) Which statement is correct? Show Answer

Q443) The most stable conformational isomer of cyclohexane is: Show Answer

Q444) Baeyer's reagent is used in the laboratory for: Show Answer

Q445) Which of the following is elimination reaction? Show Answer

Q446) Product formed on electrolysis of potassium salt of fumaric and maleic acid is Show Answer

Q447) The strongest ortho/para directing group is Show Answer

Q448) When chlorine is passed through warm benzene in presence of the sunlight, the product obtained is Show Answer

Q449) The lowest possible alkane with ethyl group as substituents possesses mol. mass equal to: Show Answer

Q450) The reagent (s) for the following conversion, is/are Show Answer

Q451) The number of conformation (s) for ethane is/are: Show Answer

Q452) The test for unsaturation is confirmed by the decolourisation of which of the following? Show Answer

Q453) Which does not react with chlorine in dark? Show Answer

Q454) The ozonolysis of isobutene gives: Show Answer

Q455) Which compound on reductive ozonolysis forms only glyoxal? Show Answer

Q456) The catalyst used in the manufacture of polythene by Ziegler method is: Show Answer

Q457) 1,3-butadiene has: Show Answer

Q458) Chloroform, on warming with Ag powder gives Show Answer

Q459) By Wurtz reaction, a mixture of methyl iodide and ethyl iodide gives Show Answer

Q460) Acetylene on passing into excess of HOCI solution forms: Show Answer

Q461) Ethylene forms ethylene chlorohydrin by the action of: Show Answer

Q462) Which one of the following has the smallest heat of hydrogenation per mole? Show Answer

Q463) Which of the following characteristic apply both to ethane and ethyne? Show Answer

Q464) Conjugated double bond is present in: Show Answer

Q465) The reactivities of ethane, ethylene and acetylene are of the order Show Answer

Q466) Which is not linked with methane? Show Answer

Q467) Wet ether is not used as a solvent in Wurtz reaction, because the water present in it Show Answer

Q468) Out of the following fractions of petroleum the one having the lowest boiling point is: Show Answer

Q469) Acetylene on reacting with hypochlorous acid gives: Show Answer

Q470) Which one of the following compounds will react with methyl magnesium iodide? Show Answer

Q471) When HCI gas is passed through propene in the presence of benzoyl peroxide, it gives:
Show Answer

Q472) Incorrect name of an alkyne is: Show Answer

Q473) Paraffin dissolves in: Show Answer

Q474) Which cannot be prepared by Kolbe's electrolytic reaction using single salt? Show Answer

Q475) Which of these does not follow anti-Markownikoff's rule? Show Answer

Q476) An alkyl bromide (X) reacts with Na to form 4, 5-diethyl octane. Compound (X) is: Show Answer

Q477) To avoid lead pollution, a new anti-knock compound is used. It is: Show Answer

Q478) Angle strain in cyclopropane is Show Answer

Q479) Which of the following compounds cannot be prepared singly by the Wurtz reaction? Show Answer

Q480) Which statement is false? Show Answer

Q481) The presence of unsaturation (olefinic or acetylinic bond) in an organic compound can be tested with: Show Answer

Q482) A mixture of ethyl iodide and n-propyl iodide is subjected to Wurtz reaction. The hydrocarbon that will not be formed is: Show Answer

Q483) Which of the following reacts with benzene in presence of anhydrous aluminium chloride and forms acetophenone? Show Answer

Q484) Which of the following species is aromatic? Show Answer

Q485) Compound which gives acetone on ozonolysis Show Answer

Q486) Alkynes occur in nature in the: Show Answer

Q487) Which of the following will have least hindered rotation about carbon-carbon bond? Show Answer

Q488) Wurtz reaction converts alkyl halide into alkane when it is made to react with Show Answer

Q489) Polyethylene is a resin obtained by polymerization of: Show Answer

Q490) Which of the following are produced from coaltar? Show Answer

Q491) The reduction of an alkyne to alkene using lithium metal in liquid ammonia as solvent results into Show Answer

Q492) Propene on reaction with hypochlorous acid to give Show Answer

Q493) A mixture of nitrogen and acetylene, on passing electric spark through it gives: Show Answer

Q494) Which one of these is not true for benzene? Show Answer

Q495) Presence of a nitro group in a benzene ring Show Answer

Q496) Hydrocarbon liquid at STP is: Show Answer

Q497) In the series, ethane, ethene and ethyne, the C-H bond energy is Show Answer

Q498) The shape of 2-butene is: Show Answer

Q499) The substance used as an anti-knock compound is: Show Answer

Q500) Petroleum refining is: Show Answer

Q501) Zinc-copper couple that can be used as a reducing agent is obtained by: Show Answer

Q502) A solution of sodium salt of fatty acid was electrolysed during Kolbe's reaction. The solution left after electrolysis is: Show Answer

Q503) Kolbe's synthesis on electrolysis of sodium salt of butanoic acid gives: Show Answer

Q504) The neutral wax called Ozokerite found near petroleum well is a mixture of: Show Answer

Q505) Which among the following is aromatic? Show Answer

Q506) Which among the following are used as catalyst in cracking? Show Answer

Q507) The general formula of a cycloalkane is Show Answer

Q508) Which of the following alkanes can be easily sulphonated? Show Answer

Q509) The octane number of any fuel increases with: Show Answer

Q510) The chemical reactivity of ethylene is due to: Show Answer

Q511) Product formed when 1-butene is subjected to HBr in the presence of peroxide: Show Answer

Q512) Petrol or gasoline used as an automobile fuel is a mixture of: Show Answer

Q513) The major component of L.P.G. is: Show Answer

Q514) Carbon black, used in making printing ink is obtained by the oxidation of: Show Answer

Q515) Gasoline is: Show Answer

Q516) A hydrocarbon reacts with HI to give (X) which on reacting with aqueous KOH forms (Y). Oxidation of (Y) gives 3-methyl-2-butanone. The hydrocarbon is: Show Answer

Q517) Pure acetylene has sweet ethereal smell while impure smells like garlic due to presence of: Show Answer

Q518) An alkyl halide by formation of its Grignard reagent and heating with water yields propane. What is the original alkyl halide? Show Answer

Q519) Which of the following compounds react with HBr obeying Markownikoff's rule? Show Answer

Q520) Liquid hydrocarbon can be converted to a mixture of gaseous hydrocarbon by: Show Answer

Q521) Cyclobutadiene is said to be Show Answer

Q522) Acetylene reacts with hypochlorous acid to form Show Answer

Q523) To enable easy detection of gas leakage from cylinders, the substance added to L.P.G. is: Show Answer

Q524) Octane no. of 2,3,3-trimethylbutane has been assumed to be: Show Answer

Q525) Which of the following compounds can form metallic derivatives? Show Answer

Q526) Octane no. of a fuel can be increased by: Show Answer

Q527) Catalyst used in dimerization of acetylene to prepare chloroprene is: Show Answer

Q528) Naphalene is an example of Show Answer

Q529) Benzene can react with Show Answer

Q530) In which reaction addition takes place according to Markownikoff's rule? Show Answer

Q531) Paraffin wax is: Show Answer

Q532) Which of the following is called Marsh gas? Show Answer

Q533) Which can be easily oxidized? Show Answer

Q534) n-butane and isobutene, which have same number of hydrogen and carbon atoms in their molecules, boil at different temperatures because: Show Answer

Q535) Common oxidizing agents used in organic chemistry are: Show Answer

Q536) Acetylenic hydrocarbons are acidic because: Show Answer

Q537) Butene -1 may be converted to butane by the reaction with: Show Answer

Q538) Number of acidic hydrogen atom in butyne-1 is: Show Answer

Q539) Propene on reaction with methylene iodide in presence of Zn-Cu couple gives: Show Answer

Q540) The carbon-carbon bond distance in benzene is Show Answer

Q541) Method of converting high boiling hydrocarbons into low boiling hydrocarbons is called: Show Answer

Q542) The mechanism of Wurtz reaction involves: Show Answer

Q543) The most important energy yielding constituent in biogas is: Show Answer

Q544) PVC is a polymer of: Show Answer

Q545) The flash point in India is fixed at: Show Answer

Q546) Lindlar's catalyst is: Show Answer

Q547) The order of relative acidic strengths of water, ethyne and propyne is: Show Answer

Q548) Reaction of trans-2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces: Show Answer

Q549) Ethylene reacts with slphur monochloride to give: Show Answer

Q550) Ethylene may be prepared by the dehydration of: Show Answer

Q551) Petroleum is formed by the chemical changes in: Show Answer

Q552) Common dehydrating agents for alkanes are: Show Answer

Q553) The most stable conformation of butane is: Show Answer

Q554) The product of acid catalysed hydration of 2-phenyl propene is: Show Answer

Q555) Benzene reacts with chlorine in sunlight to give a final product Show Answer

Q556) The overlapping of orbitals in benzene is of the type Show Answer

Q557) The product obtained when methyl magnesium bromide reacts with methyl alcohol is: Show Answer

Q558) Which of the following have delocalised electron? Show Answer

Q559) Which statement is correct? Show Answer

Q560) Ease of sulphonation of alkanes is: Show Answer

Q561) n-propyl bromide on treating with alcoholic KOH produces Show Answer

Q562) Fischer-Tropsch process is used in the manufacture of: Show Answer

Q563) 2-methylpropene is isomeric with butane-1. They can be distinguished by: Show Answer

Q564) The simplest alkyne is: Show Answer

Q565) An alkene, obtained by the dehydration of an alcohol (A), on ozonolysis gives two molecules of acetaldehyde for every molecule of alkene. The alcohol (A) is: Show Answer

Q566) Which of the following annulenes is anti aromatic? Show Answer

Q567) Which statement is correct? Show Answer

Q568) Which compound does not decolourize bromine dissolved in carbon tetrachloride? Show Answer

Q569) What would be the product formed when 1-bromo-3-chlorocyclobutane reacts with two equivalents of metallic sodium in ether? Show Answer

Q570) Octane number 116 is given for: Show Answer

Q571) Which of the following statements is incorrect? Show Answer

Q572) Formation of ethylene from ethyl bromide is a case of: Show Answer

Q573) The most stable alkene is, Show Answer

Q574) Ethylene can be prepared by electrolysis of an aqueous solution of: Show Answer

Q575) Reactive species in halogenation of benzene in cold and dark Show Answer

Q576) An organic alkadiene on reductive ozonolysis produces
(i) acetaldehyde
(ii) acetone
(iii) 2-methylpropane-1, 3-dial
The formula of alkadiene will be Show Answer

Q577) Synthetic petrol and kerosene can be obtained by passing……under heat and pressure over coal Show Answer

Q578) A hydrocarbon containing 2 carbon atoms give Sabatier and Senderen’s reaction but does not give precipitate with ammoniacal silver nitrate solution. The hydrocarbon in question is: Show Answer

Q579) Acetylene can be converted to higher alkyne using the following sequence of reactions: Show Answer

Q580) Which of the following statement is correct? Show Answer

Q581) The correct boiling point order for corresponding hydrocarbons is: Show Answer

Q582) Electrolysis of cold concentrated aqueous solution of potassium methyl succinate yields: Show Answer

Q583) Alkyl halides get converted to alkenes through: Show Answer

Q584) Cycloalkanes are isomeric with Show Answer

Q585) Which gives only one monosubstitution product on chlorination? Show Answer

Q586) The presence of the chlorine atom on benzene ring makes the second substituent enter at a position Show Answer

Q587) Addition of bromine to 1,3-butadiene gives: Show Answer

Q588) A Wittig reaction with an aldehyde gives Show Answer

Q589) Ethylene di bromide on heating with metallic sodium in ether solution yields Show Answer

Q590) When alcoholic solution of ethylene dibromide is heated with granulated zinc, the compound formed is: Show Answer

Q591) Octane number is: Show Answer

Q592) When an aqueous solution containing sodium acetate and sodium propionate is electrolysed we get: Show Answer

Q593) Which one of the following methods is neither meant for the synthesis nor for separation of amines? Show Answer

Q594) Vic-dihalide on treatment with zinc dust gives: Show Answer

Q595) Which will give cyclooctyne when treated with base? Show Answer

Q596) What are the products obtained upon the ozonolysis of pent-2-ene? Show Answer

Q597) Addition of halogen acid occurs at slowest rate in: Show Answer

Q598) The Markownikoff's rule is the best applicable to the reaction between Show Answer

Q599) Which of the following acid reacts to reverse the Markownioff's rule? Show Answer

Q600) The addition of HOCl on alkenes in presence of strong acids to form halohydrins proceeds via formation of: Show Answer

Q601) On treatment with chlorine in presence of sunlight, toluene gives the product Show Answer

Q602) Ethylene is used for: Show Answer

Q603) Statement 1: Acetylene forms acetylide but ethylene does not.
Statement 2: Acetylene is lighter than air Show Answer

Q604) Statement 1: Acetylene is more reactive then ethylene.
Statement 2: The acetylene, there is greater strain and hence is reactive. The strain disappears when addition occurs. Show Answer

Q605) Statement 1: 2,3-dimethyl but 2 ene is more stable than but 2 ene.
Statement 2: Tweleve hyper conjugation structure can be written for 2,3 dimethyl but 2ene while but 2 ene has only six. Show Answer

Q606) Which of the following conformations will be the most stable? Show Answer

Q607) In the following structures, which one is having staggered conformation with maximum dihedral angle? Show Answer

Q608) Experimentally reducing a functional group cannot be done by which one of the following reagents? Show Answer

Q609) Staggered and eclipsed conformers of ethane are Show Answer

Q610) 2-methyl butane on reacting with bromine in the presence of sunlight gives mainly Show Answer

Q611) The incorrect statement regarding conformations of ethane is Show Answer

Q612) Total number of isomeric compounds (including stereoisomers) formed by monochlorination of 2-methylbutane is . . . . . . . Show Answer

Q613) Number of isomeric products formed by monochlorination of 2-methylbutane in presence of sunlight is . . . . . . . Show Answer

Q614) Total number of possible stereoisomers of dimethyl cyclopentane is . . . . . Show Answer

Q615) The dihedral angle in staggered form of Newman projection of 1, 1, 1-trichloro ethane is degree. (Round off to the nearest integer) Show Answer

Q616) For the following compound, the gauche form is stable when Z is Show Answer

Q617) Which of the following is the most stable conformation of bromocyclohexane? Show Answer

Q618) Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) Treatment of bromine water with propene yields 1-bromopropan-2-ol.
Reason (R) Attack of water on bromonium ion follows Markownikoff rule and results in 1-bromopropan-2-ol.
In the light of the above statements, choose the most appropriate answer from the options given below. Show Answer

Q619) Which of the following is Lindlar catalyst? Show Answer

Q620) Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of Show Answer

Q621) The incorrect statement regarding ethyne is Show Answer

Q622) The stereoisomers that are formed by electrophilic addition of bromine to trans-but-2-ene is/are Show Answer

Q623) Which of the following molecules does not show stereo isomerism? Show Answer

Q624) Which of the following compounds shows geometrical isomerism? Show Answer

Q625) When neopentyl alcohol is heated with an acid, it slowly converted into an 85: 15 mixture of alkenes A and B, respectively. What are these alkenes? Show Answer

Q626) Which of the following compounds produces an optically inactive compound on hydrogenation? Show Answer

Q627) The incorrect statement regarding the geometrical isomers of 2-butene is Show Answer

Q628) The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is
(excluding rearrangement) Show Answer

Q629) 3-methylhex-2-ene on reaction with HBr in presence of peroxide forms and addition product (A). The number of possible stereoisomers for 'A' is . . . . . Show Answer

Q630) The number of acyclic structural isomers (including, geometrical isomers) for pentene are . . . . . . Show Answer

Q631) An alkane A on ozonolysis gives propanal and ethanal predict the structure of alkene. Show Answer

Q632) Metallic sodium does not react normally with Show Answer

Q633) The trans-alkenes are formed by the reduction of alkynes with Show Answer

Q634) The major organic compound formed by the reaction of 1, 1, 1-trichloroethane with silver powder is Show Answer

Q635) 2-hexyne gives trans-2-hexene on treatment with Show Answer

Q636) Acetylene does not react with Show Answer

Q637) An unsaturated hydrocarbon X on ozonolysis gives A. Compound A when warmed with ammoniacal silver nitrate forms a bright silver mirror along the sides of the test tube. The unsaturated hydrocarbon X is Show Answer

Q638) Reagent needed to convert 2-butyne to trans-2 butene is: Show Answer

Q639) Which of the following is not an example of benzenoid compound? Show Answer

Q640) Which of the following is an aromatic compound? Show Answer

Q641) Which of the following compounds is not aromatic? Show Answer

Q642) Presence of a nitro group in a benzene ring Show Answer

Q643) Which of the following molecule/species is most stable? Show Answer

Q644) Which of the following compounds is non-aromatic? Show Answer

Q645) Which of the following is most stable? Show Answer

Q646) Which one of the following compound(s) is/are aromatic in nature? Show Answer

Q647) Which one of the following compounds is not aromatic? Show Answer

Q648) Which among the following is the strongest acid? Show Answer

Q649) Which one of the following compounds is non-aromatic? Show Answer

Q650) Among the following four aromatic compounds, one will have the lowest melting point? Show Answer

Q651) The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is Show Answer

Q652) Which of the following in antiaromatic? Show Answer

Q653) Which of the following is a nonbenzenoid aromatic compound? Show Answer