Practice Test

Q1) Which of the following modes of expressing concentration is independent of temperature? Show Answer

Q2) A molal solution is one that contains one mole of a solute in Show Answer

Q3) The molarity of pure water is Show Answer

Q4) Molality is expressed as Show Answer

Q5) Which of the following is not a solution? Show Answer

Q6) Solutions with components which obey Raoults law over the entire composition range are called Show Answer

Q7) At higher altitudes, the boiling point of water lowers because Show Answer

Q8) Which of the following is a colligative property? Show Answer

Q9) The example of a solution of liquid in gas is : Show Answer

Q10) Which of the following is not the colligative property? Show Answer

Q11) Which of the following statements is wrong concerning ideal solutions? Ideal solutions can be formed when their components Show Answer

Q12) A pressure cooker reduces cooking time because Show Answer

Q13) For a non - electrolyte solution, the Van't Hoff factor is equal to Show Answer

Q14) Which of the following liquid pairs shows a negative deviation from Raoult's law Show Answer

Q15) Which of the following is not the correct criterion for an ideal solution? Show Answer

Q16) Solutions which distill without change in composition or temperature are called Show Answer

Q17) An azeotropic solution of two liquids has boiling point lower than either of them when it Show Answer

Q18) According to Raoult's law, the relative lowering in vapour pressure of a solution is equal to Show Answer

Q19) The phenomenon of osmosis was reported by Show Answer

Q20) Isotonic solutions are the solutions having the same Show Answer

Q21) The boiling point of a solvent containing a non-volatile solute? Show Answer

Q22) The colligative properties of a dilute solution depend on Show Answer

Q23) Which of the following solutions have lowest freezing point? Show Answer

Q24) A molal solution is one that contains one mole of a solute in Show Answer

Q25) The ratio of the value of any colligative property for KCl solution to that for sugar solution is nearly Show Answer

Q26) The molal elevation constant is the ratio of elevation in boiling point to Show Answer

Q27) Two solution A and B are separated by a semipermeable membrane. If the solvent flows from A to B, then Show Answer

Q28) The osmotic pressure observed when benzoic acid is dissolved in benzene is less than expected. This may be due to the reason that Show Answer

Q29) Sea water is converted into fresh water based upon the phenomenon of Show Answer

Q30) The relative lowering of vapour pressure of a solution on the addition of a non - volatile solute Show Answer

Q31) Which of the following statements is true for a solution of chloroform and acetone? Show Answer

Q32) Blood has been found to be isotonic with Show Answer

Q33) Which of the following 0.1 M aqueous solutions will have the lowest freezing point? Show Answer

Q34) Which of the following aqueous molal solutions will have highest freezing point? Show Answer

Q35) What happens when an egg is kept in a saturated solution of NaCl after removing hard shell of the egg in dilute hydrochloric acid? Show Answer

Q36) Osmotic pressure is measured by Show Answer

Q37) Partial vapour pressure of a solution component is directly proportional to its mole fraction. This statement is known as
Show Answer

Q38) The law which relates the solubility of a gas to its pressure is called
Show Answer

Q39) Blood cells retain their normal shape in solution which are Show Answer

Q40) Which of the following precipitates acts as semipermeable membrane? Show Answer

Q41) The vapour pressure of water depends upon Show Answer

Q42) Which of the following statements is wrong? Show Answer

Q43) Which of the following statements is not correct? Show Answer

Q44) When glycerine is added to a litre of water, which of the following is observed? Show Answer

Q45) Which of the following conditions is not true for a solution of ethyl alcohol and cyclohexane? Show Answer

Q46) Three bottles A, B and C contain 1 M, 1 m and 1 N aqueous solution of sulphuric acid respectively. Which of the following statement is correct? Show Answer

Q47) What will happen if a thin slice of suger beet is placed in a concentrated solution of sodium chloride? Show Answer

Q48) Which of the following solution pairs cannot be separated into its pure components by fractional distillation? Show Answer

Q49) A solution contains 16 g of methanol and 90 g of water. The mole fraction of methanol in the solution is Show Answer

Q50) What weight of sodium hydroxide should be dissolved to prepare 250 ml of 0.2 M solution? Show Answer

Q51) 100 ml of 0.1 M solution A is mixed with 20 ml of 0.2 M solution B. The final molarity of the solution is Show Answer

Q52) In a solution containing 1 mole of ethyl alcohol and 4 mol of water, the mole fraction of water is Show Answer

Q53) The amount of solute required to prepare 10 L of a decimolar solution is Show Answer

Q54) If 100 ml of 1.0 M NaOH solution is diluted to 1.0 L, the resulting solution contains Show Answer

Q55) The molality of a solution containing 0.1 mol of a substance in 100 g of water is Show Answer

Q56) What volume of 36 N and 1 N sulphuric acid must be mixed to get 1 L of 6 N sulphuric acid Show Answer

Q57) The number of moles of NaCl in 2 L of 3 M NaCl solution is : Show Answer

Q58) An aqueous solution of urea containing 6 g in 500 ml has density equal to 1.05. If the molar mass of urea is 60, then the molality of the solution is Show Answer

Q59) The normality of 10% (weight / volume) acetic acid is Show Answer

Q60) The vapour pressure of ethyl alcohol at 298 K is 40 mm of Hg. Its mole fraction in a solution with methyl alcohol is 0.80. Its vapour pressure in the solution if it obeys Raoult's law is Show Answer

Q61) The vapour pressures of two pure components A and B forming an ideal solution are 100 torr and 80 torr respectively. The total pressure of the solution obtained by mixing 2 mol of A and 3 mol of B is Show Answer

Q62) To a 4 L of 0.2 M solution of NaOH, 2L of 0.5 M NaOH are added. The molarity of the resulting solution is : Show Answer

Q63) 5.0 g of glucose (molar mass = 180) is dissolved in 75 g of water. The mass % glucose is Show Answer

Q64) Six grams of urea (molar mass = 60) are dissolved in 90 g of water. The relative lowering of vapour pressure is equal to Show Answer

Q65) A 0.6% solution of urea (molar mass = 60) would be isotonic with Show Answer

Q66) A 5% solution of glucose (molar mass = 180) is isotonic with a 2.5% solution of a substance x at the same tempreature. The molar mass of x is Show Answer

Q67) What weight of NaOH is required to neutralise 100 ml of 0.1 N HCl? Show Answer

Q68) Two liquids A and B have vapour pressures 500 and 200 torr respectively at a certain temperature. In an ideal solution of the two, the mole fraction of A at which two liquids have equal partial pressure is Show Answer

Q69) If a solution containing 5% of a substance X is isotonic with a solution containing 10 g of urea per litre. The molar mass of substance X is Show Answer

Q70) What is the mole fraction of acetic acid in a solution obtained by mixing 120 g of acetic acid and 100 g of ethyl alcohol? Show Answer

Q71) When 250 ml of 0.25 M NaCl solution is diluted with water to a volume of 500 ml, the concentration of solution becomes Show Answer

Q72) For a ten percent solution of acetic acid in water, 1.85 is the concentration expressed as Show Answer

Q73) A solution I contains 1 g of urea in 100 ml of solution II contains 2 g of glucose in 100 ml of solution. Point out the correct statement Show Answer

Q74) The molarity of an aqueous solution of NaOH containing 8 g in 2 L of solution is Show Answer

Q75) The values of calculated and observed molar mass of calcium nitrate are 164 and 65.4 respectively. The degree of dissociation of calcium nitrate is Show Answer

Q76) Compared to the osmotic pressure of 0.1 M urea, the osmotic pressure of 0.01 M KCl will be (assume 100% dissociation) Show Answer

Q77) The values of observed and normal molar masses of acetic acid are 118 and 60 respectively. The Van't Hoff factor is Show Answer

Q78) What percent of a solution of a non- volatile solute 's' (mol.wt. = 350) be prepared so that it is isotonic with another solution containing 0.86% solution of urea? Show Answer

Q79) A solution of glucose is 10% by volume. The volume in which 1.2 g mole of it is dissolved is: Show Answer

Q80) Molality of pure ethyl alcohol (density 0.92 g ml) is: Show Answer

Q81) A plant cell shrinks when placed in Show Answer

Q82) Which of the following pairs of solutions can we expect to be isotonic at the same temperature? Show Answer

Q83) The vapour pressure of pure benzene and toluene are 160 and 60 torr respectively. The mole fraction of toluene in vapour phase in contact with equimolar solution of benzene and toluene is Show Answer

Q84) A bottle contains 100 cc of 0.1 M HCl solution. If 900 cc of distilled water is added to it, then the concentration of 100 ml of the final solution will be Show Answer

Q85) A 7M solution of potassium hydroxide (KOH) in water contains 40% by weight of KOH. The density of the solution is Show Answer

Q86) A sugar syrup of weight 214.2 g contains 34.2 g of sugar (molar mass = 342). The molality of the solution is Show Answer

Q87) To a 4 L of 0.2 M solution of NaO, 2L of 0.5 M NaOH are added. The molarity of the resulting solution is Show Answer

Q88) 250 ml of 6 M and 650 ml of 3 M HCl were mixed together. What volume of water is to be added so that the molarity of the final solution is 3M? Show Answer

Q89) In the case of solutions having maximum above the vapour pressure of the pur components, the azeotrope will boil at temperatures Show Answer

Q90) The vapour pressure of pure components A and B are 200 torr and 100 torr respectively. Assuming a solution of these components obeys Raoults law, the mole fraction of component A in vapour phase in equilibrium with a solution containing equimoles of A and B is Show Answer

Q91) Consider a 0.1 M solution of two solutes A and B. A behaves as a non - electrolyte while 80% of B dimerises. Which of the following statements is correct regarding these solutions? Show Answer

Q92) 5.85 g of NaCl are dissolved in 90 g of water, the mole fraction of NaCl is Show Answer

Q93) The normality of a 2.3 M sulphuric acid solution is Show Answer

Q94) If 20 ml of 0.4 N NaOH solution completely neutralises 40 ml of a dibasic acid, the molarity of the acid solution is : Show Answer

Q95) The volume of 10 N and 4 N HCl required to make 1L of 6N HCl are Show Answer

Q96) The experimental molecular weight of an electrolyte will always be less than its calculated value because the value of i (Van't Hoff factor ) is : Show Answer

Q97) Hydrochloric acid solutions A and B have concentration 0.5 N and 0.1 N respectively. The volume of solutions A and B required to make 2L of 0.2 N hydrochloric acid are Show Answer

Q98) How many grams of a dibasic acid (molar mass = 200) should be present in 100 ml of its aqueous solution to give decinormal strength? Show Answer

Q99) Electrolyte A gives 3 ions and B is a non electrolyte. If 0.1 molar solution of solute B produces an osmotic pressure P, then 0.05 molar solution of A will produce an osmotic pressure equal to Show Answer

Q100) When 0.1 mole of glucose is dissolved in 10 mole of water, the vapour pressure of water is Show Answer

Q101) The equivalent weight of hydrated oxalic acid and anhydrous oxalic acid differ by Show Answer

Q102) The molecular weight of benzoic acid in benzene as determined by depression in freezing point method corresponds to Show Answer

Q103) A solution containing 4.2 g of urea in 500 ml was found to be isotonic with a 5% (wt. /vol.) solution of an organic non - volatile solute. The molar mass of the solute is Show Answer

Q104) Two moles of a nonvolatile solute are dissolved in 5 moles of water. The vapour pressure of the solute relative to that of water is Show Answer

Q105) The vapour pressure of a solvent is 60 torr while that of its dilute solution is 52 torr. The mole fraction of the solvent is Show Answer

Q106) The values of observed and theoretical molecular masses of an electrolyte AB are 65.4 and 114.45 respectively. The electrolyte AB in the solution dissociates to the extent of Show Answer

Q107) An aqueous solution of 6.3 g of oxalic acid dihydrate is made upto 250 ml. The volume of 0.1 N NaOH required to completely neutralise 10 ml of this solution is Show Answer

Q108) 25 ml of a solution of barium hydroxide on titration with 0.1 molar solution of hydrochloric acid gave a titre value of 35 ml. The molarity of barium hydroxide solution was Show Answer

Q109) During depression of freezing point in a solution, the following are in equilibrium Show Answer

Q110) Which of the following liquid pairs shows a positive deviation from Raoult's law? Show Answer

Q111) Two solutions of a substance (non electrolyte) are mixed in the following manner. 480 ml of 1.5 M first solution + 520 ml of 1.2 M second solution, what is the molarity of the final mixture? Show Answer

Q112) Equimolar solutions in the same solvent have Show Answer

Q113) A mixture of ethyl alcohol and propyl alcohol has vapour pressure of 290 mm at 300 K. The vapour pressure of propyl alcohol is 200 mm. If the mole fraction of ethyl alcohol is 0.6, its vapour pressure (in mm) at the same temperature will be Show Answer

Q114) Which of the following colligative properties can provide molar mass of proteins (or polymers or colloids) with greatest precision? Show Answer

Q115) Which of the following is not a colligative property? Show Answer

Q116) The vapour pressure of a solvent A is 0.80 atm. When a non volatile substance B is added to this solvent. Its vapour pressure drops to 0.6 atm. The mole fraction of B in the solution is Show Answer

Q117) A solution of 1 molal concentration of a solute will have maximum boiling point elevation when the solvent is : Show Answer

Q118) Molarity of the liquid HCl if density of solution is 1.17 g/cc is Show Answer

Q119) A 1% aqueous solution (m/v) of a certain substance is isotonic with a 3% solution of glucose (mol. Mass 180). The molar mass of the substance is Show Answer

Q120) Partial pressure of a solution component is directly proportional to its mole fraction. This statement is known as
Show Answer

Q121) All form ideal solution except Show Answer

Q122) The freezing point of 1% solution of sodium carbonate in water will be Show Answer

Q123) Which of the following solutions has largest boiling point? Show Answer

Q124) The osmotic pressure of equimolar solutions of glucose, sodium chloride and barium chloride will be in the order: Show Answer

Q125) Which is true for solution with same osmotic pressure at same temperature? Show Answer

Q126) Which of the following solutions will have maximum freezing point? Show Answer

Q127) The osmotic pressure of a solution is given by the relation Show Answer

Q128) Van't Hoff factor (i) for an aqueous solution of an electrolyte is Show Answer

Q129) Equal amounts in grams of following substance were dissolved in equal amount of water. Which of these will have the highest boiling point? Show Answer

Q130) The osmotic pressure of equimolar solutions of following solutes have been measured. Which of these show minimum osmotic pressure? Show Answer

Q131) The freezing point of equimolal aqueous solutions will be highest for Show Answer

Q132) A pair of compounds which cannot exist simultaneously in solution Show Answer

Q133) 2N - HCl will have the same molar concentration as Show Answer

Q134) A litre of public water contains 5 mg of chlorine. The concentration of chlorine in ppm is Show Answer

Q135) The freezing point of a 0.05 molal solution of a non- electrolyte in water is Show Answer

Q136) Equal amount of which of the following will cause greatest cooling Show Answer

Q137) Which one of the following pairs of the solution will be isotonic at the same temperature? Show Answer

Q138) Which one of the following statement is false? Show Answer

Q139) Density of a 2.05 M solution of acetic acid in water is 1.02 g/ml. The molality of the solution is. Show Answer

Q140) An aqueous solution that has the lowest vapour pressure at a given temperature is Show Answer

Q141) 2.5 litre of 1 M NaOH solution are mixed with another 3 litre of 0.5 M NaOH solution. Then the molarity of the resulting solution is Show Answer

Q142) When the solute is present in trace quantities the following expression is used Show Answer

Q143) A solute is soluble in two immiscible liquids which are present in a mixture. The concentration of the solute in the upper layer will be Show Answer

Q144) Which of the statements given below concerning properties of solution, describe a colligative effect? Show Answer

Q145) What is the effect of the addition of sugar on the boiling and freezing points of water? Show Answer

Q146) The volumes of 4 N HCl and 10 N HCl required to make 1 litre of 6 N HCl are Show Answer

Q147) Which of the following colligative properties can provide molar mass of proteins (or polymers or colloids) with greater precision? Show Answer

Q148) Which of the following solutions will have the highest b.p.? Show Answer

Q149) Relative lowering in vapour pressure of solution containing non-volatile solute is directly proportional to mole fraction of solute. Above statement is Show Answer

Q150) Which has maximum freezing point Show Answer

Q151) The mole fraction of the solute in one molal aqueous solution is Show Answer

Q152) The vant Hoff factor (i) accounts for Show Answer

Q153) If an aqueous solution of glucose is allowed to freeze, then crystals of which will separate out first? Show Answer

Q154) A solution of acetone in ethanol Show Answer

Q155) During osmosis, flow of water through a semi permeable membrane is Show Answer

Q156) Which values can be obtained from the information represented by the vapour pressure curve of a liquid?
(a) Normal boiling point
(b) Normal freezing point
(c) Enthalpy of vaporization Show Answer

Q157) Negative deviation from Raoult's law is observed in which one of the following binary liquid mixtures? Show Answer

Q158) An aqueous solution is 1.00 molal in Li. Which change will cause the vapour pressure of the solution to increase? Show Answer

Q159) Mole fraction of the solute in a 1.00 molal aqueous solution is Show Answer

Q160) The Van't Hoff factor i for a compound which undergoes dissociation in one solvent and association in other solvent is respectively Show Answer

Q161) Mixtures corresponding to maximum in boiling point curves show that Show Answer

Q162) The number of iodine atoms present in 1 ml of its 0.1 M solution is Show Answer

Q163) The solution having highest freezing point is Show Answer

Q164) The increase in boiling point of a surcrose solution is 0.1 K. The increase in boiling point of NaCl solution of double concentration will be Show Answer

Q165) Osmotic pressure of blood is 7.6atm at 310 K. An aqueous solution of glucose that will be isotonic with blood is Show Answer

Q166) The vapour pressure of a solvent is 30 torr and that of its dilute solution containing a non-volatile solute is 25 torr. The mole fraction of the solvent is Show Answer

Q167) The molal depression constant depends upon Show Answer

Q168) The normality of 1.8 M phosphoric acid solution is Show Answer

Q169) If each of the following salts dissociates in aqueous solution to the extent of 80%, the one with highest osmotic pressure would be Show Answer

Q170) The mole fraction of solute in 2.5 m aqueous solution is Show Answer

Q171) For a dilute solution, Raoult's law states that Show Answer

Q172) Which of the following pair can be separated by fractional distillation? Show Answer

Q173) When mercuric iodide is added to the aqueous solution of KI Show Answer

Q174) You are provided with 100 ml of M/10 HCl. If 100 ml of distilled water are added to it, its molarity becomes Show Answer

Q175) The freezing point of equimolar aqueous solution will be highest for Show Answer

Q176) The freezing point of 0.05 m solution of a non-electrolyte in water is Show Answer

Q177) What mass of ethanol be added to 1.0 kg water to have the mole fraction of ethanol equal to 0.20 ? Show Answer

Q178) A mixture of two completely miscible non ideal liquids which distil as such without change in its composition at a constant temperature as though it were a pure liquid. This mixture is known as Show Answer

Q179) Which of the following pairs shows a negative deviation from Raoult's law ? Show Answer

Q180) Among the following substance the lowest vapour pressure is exerted by Show Answer

Q181) Molarity of HCl (l) if its density is 1.17 g/ cc Show Answer

Q182) which of the following is true ? Show Answer

Q183) Raoult's law is obeyed by a binary liquid solution when Show Answer

Q184) The molarity of 648 g of pure water is Show Answer

Q185) To 50 ml of water , a few ml of acetone is mixed. The vapour pressure of water above the solution becomes Show Answer

Q186) An azeotropic mixture of chloroform and diethyl ether possess boiling point higher than either that of chloroform or diethyl ether .The mixture shows Show Answer

Q187) Which of the following is satisfied by an ideal solution ? Show Answer

Q188) On mixing 25 ml of acetone with 25 ml of ethyl alcohol, the total volume of solution is Show Answer

Q189) Units of molality are Show Answer

Q190) How many grams of dibasic acid ( molecular weight 200) should be present in 100 ml of the aqueous solution to give 0.1 normality ? Show Answer

Q191) Partial pressure of a solution component is directly proportional to its mole fraction. This is known as Show Answer

Q192) The vapour pressure of a solution increases when Show Answer

Q193) If an aqueous solution of glucose is allowed to freeze, then crystals of which will seperate out first? Show Answer

Q194) In a mixture , A and B components show negative deviation as Show Answer

Q195) In which mode of expression , the concentration of solution remains independent of temperature ? Show Answer

Q196) Which of the following plots does not represent the behaviour of an ideal binary liquid solution of A and B ? Show Answer

Q197) The aqueous solution that has highest value of lowering of vapour pressure at a given temperature is Show Answer

Q198) Which of the following is not a colligative property ? Show Answer

Q199) 12 g of urea is dissolved in 1 litre of water and 68.4 g of sucrose is dissolved in 1 litre of water. The lowering of vapour pressure of first reaction is Show Answer

Q200) As a result of osmosis the volume of the solution Show Answer

Q201) The osmotic pressure of a dilute solution is directly proportional to the Show Answer

Q202) The concentration in g / L of a solution cane sugar ( m = 342 ) which is isotonic with a solution containing 6 g of urea ( m = 60 ) per litre is Show Answer

Q203) Which one has the highest osmotic pressure ? Show Answer

Q204) Acetic acid dissolved in benzene shows a molecular mass of Show Answer

Q205) The ratio of the value of any colligative property for KCl solution to that of sugar solution is nearly Show Answer

Q206) Pressure cooker reduces cooking time because Show Answer

Q207) Which of the following will have the highest f.pt. at one atmosphere ? Show Answer

Q208) The osmotic pressure of a solution is given by the relation Show Answer

Q209) Which one of the following pairs of solution can we expect to be isotonic at the same temperature ? Show Answer

Q210) A 0.6 % solution of urea ( molecular weight = 60 ) would be isotonic with Show Answer

Q211) If 0.1 M solution of glucose and 0.1 M solution of urea are placed on two sides of the semipermeable membrane to equal heights, then it will be correct to say that Show Answer

Q212) A 5 % solution of cane sugar ( M. W. = 342) is isotonic with 1 % solution of substance X. The molecular weight of X is Show Answer

Q213) When a sugar solution is slowly frozen, the first solid which separates out is Show Answer

Q214) The vapour pressure lowering of a solvent is proportional to Show Answer

Q215) In the phenomenon of osmosis through the semipermeable membrane Show Answer

Q216) The unit of freezing point depression constant is Show Answer

Q217) The expression to compute molar mass of a solute from the elevation of boiling point of a solvent is ( where the various symbols have their usual meanings) Show Answer

Q218) Assuming 100 % ionization, the increasing order of the freezing point of the solution will be Show Answer

Q219) A dilute aqueous solution of glucose shows a vapour pressure of 750 mm of Hg at 373 K. The molality of the solution is Show Answer

Q220) A solution prepared by dissolving 15 g of non - volatile solute in 270 g of water gave relative lowering of vapour pressure of 0.005. The molecular weight of the solute is Show Answer

Q221) The osmotic pressure of solution increase if Show Answer

Q222) Which of the following method is used for measuring the osmotic pressure of the solution ? Show Answer

Q223) The normal boiling point of water is 373 K ( at 760 mm ). Vapour pressure of water at 298 K is 23 mm. If enthalpy of vaporisation is 40.656 kJ/ mol, the boiling point of water at 23 mm atmospheric pressure will be Show Answer

Q224) An ideal solution was obtained by mixing methanol and ethanol. If the partial vapour pressure of methanol and ethanol are 2.619 kPa and 4.556 kPa respectively, the composition of vapour ( in terms of mole fraction ) will be Show Answer

Q225) The vapour pressure of a solvent decreased by 10 m of Hg when a non-volatile solute was added to the solvent. The mole fraction of solute in solution is 0.2, what would be the mole fraction of solvent if decrease in vapour pressure is 20 mm of Hg ? Show Answer

Q226) For determination of molar mass of colloids, polymers and protein which colligative propertive is used ? Show Answer

Q227) At a particular temperature, the vapour pressure of two liquid A and B are 120 and 180 mm Hg respectively. If 2 moles of A and 3 moles of B are mixed to form an ideal solution. The vapour pressure of solution at same temperature will be ( in mm Hg) Show Answer

Q228) Camphor is often used in molecular mass determination because Show Answer

Q229) The solubility of gas in liquid increases with Show Answer

Q230) A non- volatile electrolyte dissolved in an aqueous solution in same molal proportion as non - electrolyte produces Show Answer

Q231) Which of the following statement is correct ? Show Answer

Q232) During depression in freezing point of a solution the following are in equilibrium Show Answer

Q233) When common salt is dissolved in water Show Answer

Q234) If molecular weight of a compound is increased then sensitivity is decreased in which of the following methods ? Show Answer

Q235) The freezing point equimolal aqueous solution will be highest for Show Answer

Q236) A 0.6 % urea solution is isotonic with Show Answer

Q237) During the evaporation of liquid Show Answer

Q238) X is dissolved in water. Maximum boiling point is observed when X is ... ( 0.1 M each ) Show Answer

Q239) Which has minimum osmotic pressure ? Show Answer

Q240) Which has highest freezing point ? Show Answer

Q241) Which will form maximum boiling point azeotrope ? Show Answer

Q242) The vapour pressure of a solvent decreased by 10 mm of mercury when a non- volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in the vapour pressure is to be 20 mm of mercury ? Show Answer

Q243) Equimolal solutions in the same solvent have Show Answer

Q244) Density of 2.05 M solution of acetic acid in water is 1.02 g / mL. The molality of the solution is Show Answer

Q245) A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of 290 mm at 300 K. The vapour pressure of propyl alcohol is 0.6, its vapour pressure ( in mm ) at the same temperature will be Show Answer

Q246) Two liquids X and Y form an ideal solution. At 300 K, vapour pressure of the solution containing 1 mol of X and 3 mol of Y is 550 mm Hg. At the same temperature, if 1 mol of Y is further added to this solution, vapour pressure of the solution increases by 10 mm Hg. Vapour pressure ( in mm Hg) of X and Y in their pure state will be, respectively Show Answer

Q247) A binary liquid solution is prepared by mixing n-heptane and ethanol. Which one of the following statements is correct regarding the behaviour of the solution ? Show Answer

Q248) A super saturated solution is a metastable state of solution in which solute concentration. Show Answer

Q249) Colligative properties of a solution depends upon Show Answer

Q250) The partition coefficient of solute X in between immiscible liquids A and B is 10 in favour of A. The partition coefficient of X in favour of B is : Show Answer

Q251) Which one is a colligative property? Show Answer

Q252) The vapour pressure of two liquids X and Y are 80 and 60 Torr respectively. The total vapour pressure of the ideal solution obtained by mixing 3 moles of X and 2 moles of Y would be Show Answer

Q253) Which one of the following aqueous solutions will exhibit highest boiling point? Show Answer

Q254) Which is correct representation of phase rule? Show Answer

Q255) 40% by weight solution will contain how much mass of the solute in 1L solution, density of the solution is 1.2 g/mL? Show Answer

Q256) What is the molality of pure water? Show Answer

Q257) Which of the following associated with isotonic solutions is not correct? Show Answer

Q258) Van’t Hoff factor more than unity indicates that the solute in solution has Show Answer

Q259) The condition for the validity of Henry’s law are : Show Answer

Q260) In an osmotic pressure measurement experiment, a 5% solution of compound ‘X’ is found to be isotonic with a 2 % acetic acid solution . The gram molecular mass of ‘X’ is Show Answer

Q261) Which is a colligative property ? Show Answer

Q262) Vapour pressure of a solvent containing non-volatile solute is : Show Answer

Q263) Among the following mixtures, dipole-dipole as the major interaction is present in : Show Answer

Q264) The vapour pressure of water depends upon : Show Answer

Q265) Which of the following solution highest boiling point? Show Answer

Q266) At certain temperature a 5.12% solution of cane sugar is isotonic with a 0.9% solution of an unknown solute. The molar mass of solute is Show Answer

Q267) 2.5 L of NaCl solution contain 5 moles of the solute.What is the molarity ? Show Answer

Q268) If for a sucrose solution elevation in boiling point is 0.1℃ then what will be boiling point of NaCl solution for the same molal concentration? Show Answer

Q269) In two solutions having different osmotic pressure, the solution of higher osmotic pressure is called : Show Answer

Q270) Vapour pressure of pure A = 100 torr, moles = 2; vapour pressure of pure B=80 torr, moles = 3. Total vapour pressure of the mixture is Show Answer

Q271) Which of the following is incorrect? Show Answer

Q272) Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is Show Answer

Q273) Lowering in vapour pressure is the highest for: Show Answer

Q274) Which is not a colligative property in the following? Show Answer

Q275) The normality of 10% (weight/volume) acetic acid is Show Answer

Q276) Two solutions have different osmotic pressure. The solution of lower osmotic pressure is called : Show Answer

Q277) A 5% solution of cane sugar (molar mass 342) is isotonic with 1% of a solution of an unknown solute. The molar mass of unknown solute in g/mol is Show Answer

Q278) The distribution law holds good for : Show Answer

Q279) Which of the following solutions has the highest normality? Show Answer

Q280) Which solution would exhibit abnormal osmotic pressure? Show Answer

Q281) The temperature at which vapour pressure of a solvent in its liquid and solid phase becomes same is called : Show Answer

Q282) The vapour pressure of a pure liquid A is 40 mm Hg at 310 K. The vapour pressure of this liquid in a solution with liquid B is 32 mm Hg. What is the mole fraction of A in the solution if it obeys the Raoult’s law? Show Answer

Q283) Which of the following shows maximum depression in freezing point? Show Answer

Q284) The substances whose solubility decreases with increase in temperature : Show Answer

Q285) 3.65 g of HCl is dissolved in 16.2 g of water. The mole fraction of HCl in the resulting solution is Show Answer

Q286) Phenol dimerises in benzene having van’t Hoff factor 0.54. What is the degree of association? Show Answer

Q287) Choose the correct statement.
When concentration of a salt solution is increased
Show Answer

Q288) Which of the following aqueous solutions produce the same osmotic pressure?
(i)0.1 M NaCl solution
(ii) 0.1 M glucose solution
(iii)0.6 g urea in 100 mL solution
(iv)1.0 g of a non-electrolyte solute (X) in 50 mL solution (molar mass of X=200)
Show Answer

Q289) In the case of osmosis, solvent molecules move from : Show Answer

Q290) If the temperature increase from 0 ͦC to 50 ͦC at atmospheric pressure, which of the following processes is expected to take place more in case of liquids? Show Answer

Q291) Camphor is used as solvent to determine mol. wt. of non-volatile solute by Rast method because for camphor : Show Answer

Q292) The van’t Hoff factor i for a compound which undergoes dissociation in one solvent and association in other solvent is respectively : Show Answer

Q293) The melting point of most of the solid substances increase with an increase of pressure acting on them. However, ice melts at a temperature lower than its usual melting point, when the pressure increase. This is because : Show Answer

Q294) Partition coefficient of benzoic acid-ether-water in favour of ether is 2. A solution containing 8 g/litre benzoic acid in ether layer is shaken with 2 litre water. The concentration of acid in water layer is : Show Answer

Q295) Molecular weight of glucose is 180. A solution of glucose which contains 18 g/L, is Show Answer

Q296) The elevation in boiling point for one molal solution of a solute in a solvent is called : Show Answer

Q297) The depression in f. p. of 0.01 m aqueous solution of urea, sodium chloride and sodium sulphate is in the ratio : Show Answer

Q298) Colligative properties are used for the determination of Show Answer

Q299) The natural semipermeable membrane is : Show Answer

Q300) The energy that opposes the dissolution of a solute in a solvent is called : Show Answer

Q301) If molecular interaction of two different liquid molecules are stronger than the molecular interactions of the same liquid molecules the mixture is expected to show : Show Answer

Q302) When mercuric iodide is added to the aqueous solution of potassium iodide, the Show Answer

Q303) Which statement is wrong for distribution law? Show Answer

Q304) The relative lowering of vapour pressure of a dilute aqueous solution containing non-volatile solute is 0.0125. The molality of the solution is about Show Answer

Q305) When an ideal binary solution is in equilibrium with its vapour, molar ratio of the two components in the solution and in the vapour phase is : Show Answer

Q306) The distribution law was given by : Show Answer

Q307) Which of the following is incorrect? Show Answer

Q308) The vapour pressure of water at 20℃ is 17.54 mm. When 20 g of a non-ionic, substance is dissolved in 100 g of water, the vapour pressure is lowered by 0.30 mm. What is the molecular mass of the substance? Show Answer

Q309) The highest temperature at which vapour pressure of a liquid can be measured is : Show Answer

Q310) The statement “the relative lowering of the vapour pressure is equal to th ratio ot moles of the solute to the total number of the moles in the solution” refers to Show Answer

Q311) The azeotropic mixture of water (b. pt.100℃) and HCl (b.pt. 85℃) boils at 108.5℃.When this mixture is distilled it is possible to obtain Show Answer

Q312) A 5% solution of sugarcane (mol. wt. = 342) is isotonic with 1% solution of X under similar conditions. The molecular weight of X is Show Answer

Q313) Which of the following is incorrect? Show Answer

Q314) Two solutions of glucose have osmotic pressure 1.0 and 3.5 atm. If 1 L of first solution is mixed with V L of second solution, the osmotic pressure of the resultant solution becomes 2.5 atm. Volume of second solution is Show Answer

Q315) 5% (wt./vol.) aqueous NaCl solution and 5% (wt./vol.) aqueous KCl solution are : Show Answer

Q316) Boiling point of water is defined as the temperature at which : Show Answer

Q317) When a solute distributes itself between two immiscible liquids in contact with each other, a mathematical constant ratio exists between : Show Answer

Q318) The molal elevation constant for water is 0.52. What will be the boiling point of 2 molar sucrose solution at 1 atm pressure? (Assume b.p. of pure water is 100℃) Show Answer

Q319) The molal elevation/depression constant depends upon : Show Answer

Q320) According to phase rule, if P=3,C=1, then F must be equal to : Show Answer

Q321) A thermometer which can be used only for accurate measurement of small differences in temperature is known as a: Show Answer

Q322) When two liquids A and B are mixed then their boiling points becomes greater than both of them. What is the nature of this solution? Show Answer

Q323) An aqueous solution of 6.3 g oxalic acid dihydrate is made up to 250 mL. The volume of 0.1 N sodium hydroxide required to completely neutralise 10 mL of this solution is Show Answer

Q324) Water will boil at 101.5 ͦC at which of the following pressure? Show Answer

Q325) The phenomenon in which cells are shrinked down if placed in hypertonic solution is called : Show Answer

Q326) Beckmann thermometer are used to measure : Show Answer

Q327) When a crystal of the solute is introduced into a super saturated solution of the solute : Show Answer

Q328) The mole fraction of the solute in one modal aqueous solution is Show Answer

Q329) Which of the following solutions will have the highest boiling point ? Show Answer

Q330) When attraction between A-B is more than that of A-A and B-B, the solution will show…..deviation from Raoult’s law Show Answer

Q331) The solubility of a gas in water depends on : Show Answer

Q332) Which of the following is not a colligative property? Show Answer

Q333) The vapour pressure of benzene at a certain temperature is 640 mm of Hg. A non-volatile and non-electrolyte solid weighing 2.175 g is added to 39.08 g of benzene. If the vapour pressure of the solution is 600 mm of Hg, what is the molecular weight of solid substance? Show Answer

Q334) The vapour pressure of benzene at 90°C is 1020 torr. A solution of 5 g of a solute in 58.5 g benzene has vapour pressure 990 torr. The molecular weight of the solute is : Show Answer

Q335) The osmatic pressure of 0.4% urea solution is 1.66 atm. and that of a solutions of sugar of 3.42% is 2.46 atm. When both the solutions are mixed then the osmatic pressure of the resultant solution will be Show Answer

Q336) Vapour pressure of dilute aqueous solution of glucose is 750 mm of mercury at 373 K. The mole fraction of solute is Show Answer

Q337) The relative lowering of vapour pressure produced by dissolving 71.5 g of a substance in 1000 g of water is 0.00713. The molecular weight of the substance will be : Show Answer

Q338) Binary liquid solutions which exhibit negative deviations from Raoult’s law boil at temperature ….than the expected value : Show Answer

Q339) A substance will be deliquescent it its vapour pressure is : Show Answer

Q340) Which of the following concentration term is/are independent of temperature? Show Answer

Q341) An azeotropic mixture of two liquids has boiling point lower than either of them, when it Show Answer

Q342) At 88 ͦC benzene has a vapour pressure of 900 torr and toluene has a vapour pressure of 360 torr. What is the mole fraction of benzene in the mixture with toluene that will boil at 88 ͦC at 1 atm pressure, benzene-toluene form an ideal solution? Show Answer

Q343) Which one of the statements given below concerning properties of solutions, describes a colligative effect? Show Answer

Q344) An example of a solution having liquid in gas is: Show Answer

Q345) Which of the given solutions has highest osmotic pressure? Show Answer

Q346) At high altitude the boiling of water occurs at low temp. because : Show Answer

Q347) If a 5.25% (wt./vol.) solution of a non-electrolyte is isotonic with 1.50% (wt./vol.) solution of urea, (mol-wt = 60) is the same solvent then the molecular weight of non-electrolyte is : Show Answer

Q348) Which solution will have least vapour pressure? Show Answer

Q349) The phenomenon in which cells are swelled up and then burst if placed in hypotonic solution is called : Show Answer

Q350) If 117 g NaCl is dissolved in 1000 g of water the concentration of the solution is said to be Show Answer

Q351) Increasing the temperature of an aqueous solution will cause Show Answer

Q352) The vapour pressure of two liquids P and Q are 80 torr and 60 torr respectively. The total vapour pressure obtained by mixing 3 mole of P and 2 mole of Q would be : Show Answer

Q353) The molal boiling point constant of water is 0.53 ͦC. When 2 mole of glucose are dissolved in 4000 g of water, the solution will boil at : Show Answer

Q354) One mole of non-volatile solute is dissolved in two mole of water. The vapour pressure of the solution relative to that of water is : Show Answer

Q355) How many grams of dibasic acid (mol. wt. 200) should be present in 100 mL of the aqueous solution to give 0.1 N? Show Answer

Q356) The vapour pressure of a dilute solution is not influenced by : Show Answer

Q357) 35.4 mL of HCl is required for the neutralisation of a solution containing 0.275 g of sodium hydroxide. The normality of hydrochloric acid is Show Answer

Q358) Molal elevation constant of a liquid is : Show Answer

Q359) The solubility of gas in liquid depends upon : Show Answer

Q360) Relative lowering of vapour pressure of a dilute solution is 0.2. What is the mole fraction of the non-volatile solute ? Show Answer

Q361) If 0.1 M solutions of each electrolyte are taken and if all electrolytes are completely dissociated, then whose boiling point will be highest ? Show Answer

Q362) A and B ideal gases. The molecular weights of A and B are in the ratio of 1:4. The pressure of a gas mixture containing equal weight of A and B is p atm. What is the partial pressure (in atm) of B in the mixture? Show Answer

Q363) What amount of water is added in 40 mL of NaOH (0.1 N) which is neutralised by 50 mL of HCl (0.2 N)? Show Answer

Q364) The amount of ice that will separate out on cooling a solute containing 50 g of ethylene glycol in 200 g water to -9.3℃ will be Show Answer

Q365) The elevation of boiling point method is used for the determination of molecular weight of: Show Answer

Q366) Equimolal solutions will have the same boiling point, provided they do not show : Show Answer

Q367) Abnormal colligative properties are observed only when the dissolved non-volatile solute in a given dilute solution Show Answer

Q368) As a result of osmosis, the volume of the concentrated solution : Show Answer

Q369) At a suitable pressure near the freezing point of ice, there exists : Show Answer

Q370) Which of the following concentration units is independent of temperature? Show Answer

Q371) In cold countries, ethylene glycol is added to water in the radiators of cars during winters. It results in : Show Answer

Q372) The movement of solvent molecules through a semipermeable membrane is called Show Answer

Q373) An aqueous solution of methanol in water has vapour pressure Show Answer

Q374) Which pair shows a contraction in volume on mixing along with evolution of heat? Show Answer

Q375) At 80 ͦC, the vapour pressure of pure liquid 'A^'is 520 mm Hg and that of pure liquid 'B' is 1000 mm Hg. If a mixture of solution 'A^' and 'B' boils at 80°C and 1 atm pressure, the amount of 'A' in the mixture is : (1 atm = 760 mm Hg) Show Answer

Q376) Van’t Hoff factor(i): Show Answer

Q377) Following solutions at the same temperature will be isotonic : Show Answer

Q378) The osmatic pressure of a 5% (wt./vol) solution of cane sugar at 150℃ is Show Answer

Q379) Mole fraction of solute in benzene is 0.2 then find molality of solute Show Answer

Q380) Which is not applicable to distribution law? Show Answer

Q381) 3.0 molal NaOH solution has a density of 1.110 g/mL. The molarity of the solution is Show Answer

Q382) Sodium sulphate is soluble in water, while barium sulphate is sparingly soluble because : Show Answer

Q383) Distribution law is applicable when : Show Answer

Q384) Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is Show Answer

Q385) x gram of water is mixed in 69 g of ethanol. Mole fraction of ethanol in the resultant solution is 0.6. What is the value of x in grams? Show Answer

Q386) Dissolution of a solute is an exothermic process if : Show Answer

Q387) Molarity is expressed as Show Answer

Q388) Which of the following compounds correspond to maximum van’thoff factor for dilute solution? Show Answer

Q389) Solute A is a ternary electrolyte and solute B is non-electrolyte. If 0.1 M solution of solute B produces an osmotic pressure of 2P, then 0.05 M solution of A at the same temperature will produce an osmotic pressure equal to : Show Answer

Q390) A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of 290 mm at 300 K. the vapour pressure of propyl alcohol is 200 mm. If the mole fraction of ethyl alcohol is 0.6, its vapour pressure (in mm) at the same temperature will be Show Answer

Q391) The solubility order for the following gases is : Show Answer

Q392) Equal masses of methane and oxygen are mixed in an empty container at 25℃. The fraction of the total pressure exerted by oxygen is Show Answer

Q393) Two liquids X and Y form an ideal solution. The mixture has a vapour pressure of 400 mm at 300 K when mixed in the molar ratio of 1:1 and a vapour pressure of 350 mm when mixed in the molar ratio of 1:2 at the same temperature. The vapour pressures of the two pure liquids X and Y respectively are Show Answer

Q394) Azeotropic mixture of HCl and water has Show Answer

Q395) In which ratio of volume 0.4 M HCl and 0.9 M HCl are to be mixed such that the concentration of the resultant solution becomes 0.7 M ? Show Answer

Q396) Which of the following can be measured by the Ostwald-Walker dynamic method? Show Answer

Q397) For dilute solution Raoult’s law states that Show Answer

Q398) 100 mL of water and 50 mL ether mixture is shaken with succinic acid. At equilibrium ether layer contains 0.127 g and water layer contains 1.843 g of succinic acid. The partition coefficient of succinic acid in favour of water is : Show Answer

Q399) The lubricating action of an oil is more if it possess : Show Answer

Q400) Maximum lowering of vapour pressure is observed in the case of Show Answer

Q401) The solubility of a gas in liquid at a temperature is directly proportional to its : Show Answer

Q402) Which of the following concentration factors is affected by change in temperature? Show Answer

Q403) Which of the following mixture does not show positive deviation from the Raoult’s law? Show Answer

Q404) The ratio of vapour pressure over solution phase on mixing two immiscible liquids is equal to : Show Answer

Q405) The vapour pressure of benzene at 80 ͦC is lowered by 10 mm by dissolving 2g of a non-volatile substance in 78 g of benzene. The vapour pressure of pure benzene at 80 ͦC is 750 mm. The molecular weight of the substance will be : Show Answer

Q406) A solution has an osmotic pressure of 0.821 atom at 300 K. its concentration would be : Show Answer

Q407) Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is Show Answer

Q408) On adding 1 g arsenic to 80 g benzene, the freezing point of benzene is lowered by 0.19℃ . The formula of arsenic is Show Answer

Q409) The process of getting fresh water from sea water is known as : Show Answer

Q410) The statement “the relative lowering of the vapour pressure is equal to th ratio ot moles of the solute to the total number of the moles in the solution” refers to Show Answer

Q411) X is dissolved in water. Maximum boiling point is observed when X is ….(0.1 M each) Show Answer

Q412) Which of the following statement is true? Show Answer

Q413) If 0.15 g of a solute dissolved in 15 g of solvent is boiled at a temperature higher by 0.216℃ than that of the pure solvent, the molecular weight of the substance is (molal elevation constant for the solvent is 2.16℃) Show Answer

Q414) The vapour pressure of a liquid in a closed container depends upon Show Answer

Q415) The vapour pressure of a solution is proportional to : Show Answer

Q416) The spontaneous movement of solute particles from a more concentrated solution to less concentrated solution is called : Show Answer

Q417) 19.85 mL of 0.1 N NaOH reacts with 20 mL of HCl solution for complete neutralization. The molarity of HCl solution is Show Answer

Q418) The vapour pressure will be lowest of Show Answer

Q419) Which one is correct? Show Answer

Q420) What is molality of a solution in which
(18 g glucose mol. wt. = 180) is dissolved in 500 g of water?
Show Answer

Q421) Which of the following solution in water possesses the lowest vapour pressure? Show Answer

Q422) Which of the following solutions will have highest boiling point Show Answer

Q423) The freezing point of equimolal aqueous solution will be highest for Show Answer

Q424) The normality of a 100 mL solution of sodium hydroxide which contains 4 g of NaOH, is Show Answer

Q425) Osmotic pressure of a solution at a given temperature Show Answer

Q426) A solution has a 1 : 4 mole ratio of pentane to hexane. The vapour pressures of pure hydrocarbons at 20 ͦC are 440 mm Hg for pentane and 120 mm Hg for hexane. The mole fraction of pentane in vapour phase would be : Show Answer

Q427) The vapour pressure of pure liquid A is 0.80 atm. When a non-volatile B is added to A its vapour pressure drops to 0.60 atm. The mole fraction of B in the solution is Show Answer

Q428) The freezing point of one modal NaCl solution assuming NaCl to be 100 % dissociated in water is (modal depression constant=1.86) Show Answer

Q429) The relative lowering of vapour pressure of an aqueous solution containing non-volatile solute is 0.0125. The molality of the solution is Show Answer

Q430) An aqueous solution of glucose was prepared by dissolving 18 g of glucose in 90 g of water. The relative lowering in vapour pressure is Show Answer

Q431) The unit of molality is Show Answer

Q432) An azeotropic solution of two liquids has boiling point lower than either when it Show Answer

Q433) The freezing point of water is depressed by 0.37℃ in a 0.01 mol NaCl solution. The freezing point of 0.02 molal solution of urea is depressed by Show Answer

Q434) 2 N HCl solution will have same molar concentration as a Show Answer

Q435) Molarity of a given orthophosphoric acid solution is 3 M. It’s normality is Show Answer

Q436) A liquid is in equilibrium with its vapours at its boiling point. On the average the molecules in the two phases have equal : Show Answer

Q437) Normality of 2 M sulphuric acid is Show Answer

Q438) On adding a solute to a solvent having vapour pressure 0.80 atm vapour pressure reduces to 0.60 atm. Mole fraction of solute is Show Answer

Q439) Generally those gases are soluble in water to a greater extent which : Show Answer

Q440) Pressure cooker reduces cooking time for food because Show Answer

Q441) From the colligative properties of solution which one is the best method for the determination of molecular weight of proteins and polymers : Show Answer

Q442) The vapour pressure of two pure liquid (A) and (B) are 100 torr and 80 torr respectively. The total pressure of solution obtained by mixing 2 mole of (A) and 3 mole of (B) would be : Show Answer

Q443) On the basis of intermolecular forces predict the correct order of decreasing boiling points of the compounds: Show Answer

Q444) Which has the highest freezing point at one atmosphere? Show Answer

Q445) Binary liquid mixtures which exhibit positive deviations from Raoult’s law boil at…. temperature than the expected b. p.: Show Answer

Q446) Which has minimum osmotic pressure? Show Answer

Q447) Which of the following solutions will have the highest boiling point? Show Answer

Q448) Solubility of solutes which dissolve with the liberation of heat decreases with : Show Answer

Q449) A binary liquid solution ois prepared by mixing n-heptane and ethanol. Which one of the following statements is correct regarding the behaviour of the solution? Show Answer

Q450) The values of observed and calculated molecular weights of silver nitrate are 92.64 and 170 respectively. The degree of dissociation of silver nitrate is : Show Answer

Q451) Saturated solution of NaCl on heating becomes : Show Answer

Q452) 20 g of hydrogen is present in a 5 L vessel. The molar concentration of hydrogen is Show Answer

Q453) The molarity of pure water is Show Answer

Q454) Assuming that sea water is a 3.50 weight per cent aqueous solution of NaCl. What is the molality of sea water? Show Answer

Q455) The condition under which Nernst distribution law will not hold true is : Show Answer

Q456) The relative lowering of vapour pressure of an aqueous solution containing non-volatile solute is 0.0125. The molality of the solution is Show Answer

Q457) Among the following substances, the lowest vapour pressure is exerted by : Show Answer

Q458) If 5.85 g NaCl (molecular weight 58.5) is dissolved in water and the solution is made up to 0.5 L, the molarity of the solution will be Show Answer

Q459) At temperature 327℃ and concentration C osmotic pressure of a solution is p, the same solutions at concentration C/2 and a temperature 427℃ shows osmotic pressure 2 atm, value of p will be Show Answer

Q460) Molarity of a solution prepared by dissolving 75.5 g of pure KOH in 540 mL solution is Show Answer

Q461) At 40 ͦC the vapour pressures of pure liquids, benzene and toluene, are 75 torr and 22 torr respectively. At the same temperature, the partial vapour pressure of benzene in a mixture of 78 g benzene and 46 g toluene in torr assuming the ideal solution should be : Show Answer

Q462) The reverse of fusion is freezing and it is : Show Answer

Q463) 50 g of an acid is dissolved in one litre aqueous solution. Distribution coefficient in favour of ether is 3. Acid left in aqueous layer when solution is shaken with one litre ether : Show Answer

Q464) When the vapour pressure of solutions of two liquids are less than those expected from ideal solutions, they are said to show : Show Answer

Q465) Which method cannot be used to find out the molecular weight of non-volatile solute? Show Answer

Q466) The equilibrium in a heterogeneous system can be studied by : Show Answer

Q467) If the various terms in the below given expressions have usual meanings, the van’t Hoff factor (i) cannot be calculated by which one of the expressions? Show Answer

Q468) Which of the following liquid pairs shows a positive deviation from Raoult’s law? Show Answer

Q469) In a pair of immiscible liquids, a common solute dissolves in both and the equilibrium is reached. The concentration of solute in upper layer is : Show Answer

Q470) The freezing point of the 0.05 molal solution of non-electrolyte in water is Show Answer

Q471) Osmotic pressure of blood is 7.65 atm at 310 K. An aqueous solution of glucose that will be isotonic with blood is ……….wt./vol. Show Answer

Q472) A substance is completely trimerised on dissolution in a solvent. The van’t Hoff factor (i) for such change is : Show Answer

Q473) A liquid is kept in a closed vessel. If a glass plate (negligible mass) with a small hole is kept on top of the liquid surface, then the vapour pressure of the liquid in the vessel is : Show Answer

Q474) A solute is soluble in two immiscible liquids which are present in a mixture. The concentration of the solute in the upper layer will be : Show Answer

Q475) During osmosis, flow of water through a semipermeable membrane is : Show Answer

Q476) The experimental molecular weight of an electrolyte will always be less than its calculated value because the value of van’t Hoff factor, ‘i’ is : Show Answer

Q477) The freezing point of 1% solution of lead nitrate in water will be Show Answer

Q478) The osmotic pressure of a solution at 0°C is 2 atm. What will be its osmotic pressure at 273°C under similar conditions? Show Answer

Q479) Which of the following statements is false? Show Answer

Q480) Lowering of vapour pressure is highest for Show Answer

Q481) What will be the molality of a solution having 18 g of glucose (mol. wt. = 180) dissolved in 500 g of water? Show Answer

Q482) What is the amount of urea dissolved per litre if its aqueous solution is isotonic with 10% cane sugar solution? (mol.wt.of urea =60) Show Answer

Q483) Distribution law holds good for the distribution of a dissolved substance between : Show Answer

Q484) What happens when an egg is kept in saturated solution of NaCl after removing its hard shell in dilHCl? Show Answer

Q485) Equimolar solutions of two non-electrolytes in the same solvent should have : Show Answer

Q486) Two liquids X and Y form an ideal solution at 300K, vapour pressure of the solution containing 1 mol of X and 3, mol of Y is 550 mmHg. At the same temperature, if 1 mol of Y is further added to this solution, vapour pressure of the solution increases by 10 mmHg. Vapour pressure (in mmHg)of Xand Y in their pure states will be, respectively Show Answer

Q487) Which characterises the weak intermolecular forces of attraction in a liquid? Show Answer

Q488) A certain substance ‘A’ tetramerises in water to the extent of 80%. A solution of 2.5 g of A in 100 g of water lowers the freezing point by 0.3℃. The molar mass of A is Show Answer

Q489) The average osmotic pressure of human blood is 7.8 bar at 37℃. What is the concentration of an aqueous NaCl solution that could be used in the blood steam? Show Answer

Q490) Equimolar solution in the same solvent have Show Answer

Q491) Blood cells retain their normal shapes in solutions which are : Show Answer

Q492) Volume of water needed to mix with 10 mL N HCl to get 0.1 N HCl is Show Answer

Q493) The solubility of a solid in a liquid depends on : Show Answer

Q494) Temperature coefficient is the variation in the : Show Answer

Q495) At low concentrations, the statements that equimolal solutions under a given set of experimental conditions have equal osmotic pressure is true for Show Answer

Q496) A solution containing 500 g of a protein per litre is isotonic with a solution containing 3.42 g of sucrose per litre. The molecular mass of protein is : Show Answer

Q497) Two solutions of substance (non-electrolyte) are mixed in the following manner.
480 mL of 1.5 M first solution +520 mL of 1.2 M second solution.
What is the molarity of the final mixture ?
Show Answer

Q498) Osmotic pressure of 0.4% urea solution is 1.60 atm and that of 3.42% cane sugar is 2.46 atm. When the above two solutions are mixed, the osmotic pressure of the resulting solution is Show Answer

Q499) Dissolving 120 g of urea (mol. Wt. 60) in1000 g of water gave a solution of density 1.15 g/mL. The molarity of the solution is Show Answer

Q500) The vapour pressure of water at 23℃ is 19.8 mm. 0.1 mole of glucose is dissolved in 178.2 g of water. What is the vapour pressure (in mm) of the resultant solution? Show Answer

Q501) To form a super saturated solution of salt one must : Show Answer

Q502) An aqueous solution of glucose is 10% in strength. The volume in which 1 g-mole of it is dissolved will be Show Answer

Q503) Molal depression of freezing point of water is 1.86 ͦC per 1000 g of water. 0.02 mole of urea dissolved in 100 g of water will produce a lowering of temperature of : Show Answer

Q504) The osmotic pressure of a solution can be accurately measured in the shortest possible time by : Show Answer

Q505) Acetic acid on dissolution in benzene will show : Show Answer

Q506) Who gave the phase rule? Show Answer

Q507) In a mixture of A and B, components show negative deviation when Show Answer

Q508) A non-ideal solution was prepared by mixing 30 mL chloroform and 50 mL acetone. The volume of mixture will be Show Answer

Q509) The values of observed and calculated molecular weights of calcium nitrate are respectively 65.6 and 164. The degree of dissociation of calcium nitrate will be : Show Answer

Q510) Non- volatile solute when dissolved in water : Show Answer

Q511) The energy that favours dissolution of a solute in water is known as : Show Answer

Q512) The most suitable method for the determination of molecular weight of oxyhaemoglobin, a compound of high molecular weight is : Show Answer

Q513) In a mixture A and B components show negative deviation as : Show Answer

Q514) Which statement is not correct if two immiscible liquids of mol. wt. A and B respectively are mixed in equal amount to have a mixture? Show Answer

Q515) During depression of freezing point in a solution the following are in equilibrium : Show Answer

Q516) Two bottles A and B contains 1M and 1 m aqueous solution of sulphuric acid respectively Show Answer

Q517) Distribution law is a special application of ….and vice-versa. Show Answer

Q518) If 20 mL of 0.4 N NaOH solution completely neutralizes 40 mL of a dibasic acid, the molarity of the acid solution is Show Answer

Q519) 25 mL of a solution of barium hydroxide on titration with 0.1 molar solution of hydrochloric acid gave a titre value of 35 mL. The molarity of barium hydroxide solution was Show Answer

Q520) Which of the following solutions will have the highest boiling point ? Show Answer

Q521) The vapour pressure of pure liquid is 1.2 atm. When a non-volatile substance B is mixed in A, then its vapour pressure becomes 0.6 atm. The mole fraction of B in the solution is Show Answer

Q522) If liquids A and B form an ideal solution, the Show Answer

Q523) Which has the minimum freezing point? Show Answer

Q524) The depression in f.p. is directly proportional to : Show Answer

Q525) The vapour pressure will be lowest of Show Answer

Q526) Solubility of deliquescent substances in water is generally : Show Answer

Q527) An aqueous solution is 1.0 molal in KI. Which change will cause the vapour pressure of solution to increase : Show Answer

Q528) Which one of the following is not correct for an ideal solution? Show Answer

Q529) 1 kg of NaOH solution contains 4 g of NaOH. The approximate concentration of the solution is Show Answer

Q530) 6 g urea is dissolved in 90 g water. The relative lowering of vapour pressure is equal to : Show Answer

Q531) Which is correct about Henry’s law? Show Answer

Q532) The mass of glucose that should be dissolved in 50 g of water in order to produce the same lowering of vapour pressure as is produced by dissolving 1 g of urea in the same quantity of water is Show Answer

Q533) The volume of 10 N and 4 N HCl required to make 1L of 7 N HCl are Show Answer

Q534) A solution of sulphuric acid in water exhibits : Show Answer

Q535) The molarity of the solution obtained by dissolving 2.5g of NaCl in 100 mL of water is Show Answer

Q536) Which one is a colligative property? Show Answer

Q537) The quantity which changes with temperature is Show Answer

Q538) Density of a 2.05 M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is Show Answer

Q539) Two solutions of a substance (non-electrolyte) are mixed in the following manner. 480 mL of 1.5 M first solution + 520 mL of 1.2 M second solution. What is the molarity of the final mixture? Show Answer

Q540) 250 g of solution of D-glucose in water contains 10.8% of carbon by weight. The molality of the solution is nearest to (Given: Atomic weights are H: 1 u, C: 12 u, 0:16 u) Show Answer

Q541) A commercially sold conc. HCl is 35% HCl by mass. If the density of this commercial acid is 1.46 g/mL, the molarity of this solution is
(Atomic mass: Cl = 35.5 amu, H = 1 amu) Show Answer

Q542) The number of units, which are used to express concentration of solutions from the following is . . . . . . mass per cent, mole, mole-fraction, molarity, ppm, molality Show Answer

Q543) Calculate the mole fraction of ethanol and water, If 3 moles of ethanol are dissolved in 1000 g of water. Show Answer

Q544) A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of 290 mm at 300 K. The vapour pressure of propyl alcohol is 200 mm. If the mole fraction of ethyl alcohol is 0.6, its vapour pressure (in mm) at the same temperature will be Show Answer

Q545) Two open beakers one containing a solvent and the other containing a mixture of that solvent with a non-volatile solute are together sealed in a container. Over time Show Answer

Q546) Which one of the following statements regarding Henry's law is not correct? Show Answer

Q547) Two liquids X and Y form an ideal solution at 300 K, vapour pressure of the solution containing 1 mol of X and 3 mol of Y is 550 mm Hg. At the same temperature, if 1 mol of Y is further added to this solution, vapour pressure of the solution increases by 10 mm Hg. Vapour pressure (in mmHg) of X and Y in their pure states will be, respectively Show Answer

Q548) A binary liquid solution is prepared by mixing n-heptane and ethanol. Which one of the following statements is correct regarding the behaviour of the solution? Show Answer

Q549) Identify the mixture that shows positive deviations from Raoult's law. Show Answer

Q550) A solution of two miscible liquids showing negative deviation from Raoult's law will have Show Answer

Q551) The vapour pressures of pure liquids A and B are 400 and 600 mmHg, respectively at 298 K. On mixing the two liquids, the sum of their initial volumes is equal to the volume of the final mixture. The mole fraction of liquid B is 0.5 in the mixture. The vapour pressure of the final solution, the mole fractions of components A and B in vapour phase, respectively Show Answer

Q552) A gaseous mixture of two substances A and B, under a total pressure of 0.8 atm is in equilibrium with an ideal liquid solution. The mole fraction of substance A is 0.5 in the vapour phase and 0.2 in the liquid phase. The vapour pressure of pure liquid A is . . . . . . atm. (Nearest integer) Show Answer

Q553) At 363 K the vapour pressure of A is 21 kPa and that of B is 18 kPa. One mole of A and 2 moles of B are mixed. Assuming that this solution is ideal, the vapour pressure of the mixture is . . . . . . kPa. [Round off to the Nearest Integer]. Show Answer

Q554) At 300 K, the vapour pressure of a solution containing 1 mole of n-hexane and 3 moles of n-heptane is 550 mm of Hg. At the same temperature, if one more mole of n-heptane is added to this solution, the vapour pressure of the solution increases by 10 mm of Hg. What is the vapour pressure in mm Hg of n-heptane in its pure state . . . . . ? Show Answer

Q555) Which of the following plot is in accordance with the Henry law? Show Answer

Q556) Two liquids A and B form an ideal solution. The vapour pressure of pure A and pure B are 66 mm Hg and 88 mm Hg, respectively, Calculate the composition of vapour A in the solution which is equilibrium and whose molar volume is 36% Show Answer

Q557) The solution from the following with highest depression in freezing point/lowest freezing point is Show Answer

Q558) What happens to freezing point to benzene when small quantity of naphthalene is added to benzene? Show Answer

Q559) In the depression of freezing point experiment.
A. Vapour pressure of the solution is less than that of pure solvent
B. Vapour pressure of the solution is more than that of pure solvent
C. Only solute molecules solidify at the freezing point
D. Only solvent molecules solidify at the freezing point
Choose the most appropriate answer from the options given below. Show Answer

Q560) Two solutions A and B are prepared by dissolving 1 g of non-volatile solutes X and Y, respectively in 1 kg of water. The ratio of depression in freezing points for A and B is found to be 1: 4. The ratio of molar masses of X and Y is Show Answer

Q561) Equimolar solutions in the same solvent have Show Answer

Q562) Boiling point of a 2% aqueous solution of a non-volatile solute A is equal to the boiling point of 8% aqueous solution of a non-volatile solute B. The relation between molecular weights of A and B is Show Answer

Q563) If the boiling points of two solvents X and Y (having same molecular weights) are in the ratio 2:1 and their enthalpy of vaporisations are in the ratio 1:2, then the boiling point elevation constant of X is m times the boiling point elevation constant of Y. The value of m is . . . . . .(nearest integer). Show Answer

Q564) 2 g of a non-volatile non-electrolyte solute is dissolved in 200 g of two different solvents A and B whose ebullioscopic constants are in the ratio of 1:8. The elevation in boiling points of A and B are in the ratio x / y (x: y). The value of y is . . . . . . (Nearest integer) Show Answer

Q565) Which one of the following 0.10 M aqueous solutions will exhibit the largest freezing point depression? Show Answer

Q566) We have three aqueous solutions of NaCl labelled as 'A', 'B' and 'C' with concentration 0.1 M, 0.01 M and 0.001 M, respectively. The value of van't Hoff factor (i) for these solutions will be in the order Show Answer

Q567) Which one of the following 0.06 M aqueous solutions has lowest freezing point? Show Answer

Q568) For 1 molal aqueous solution of the following compounds, which one will show the highest freezing point? Show Answer

Q569) Which one of the following aqueous solutions will exhibit highest boiling point? Show Answer

Q570) If the degree of dissociation of aqueous solution of weak monobasic acid is determined to be 0.3, then the observed freezing point will be . . . . . . % higher than the expected/theoretical freezing point. (Neartes integer) Show Answer