Practice Test


1) Which of the following modes of expressing concentration is independent of temperature?


2) A molal solution is one that contains one mole of a solute in


3) The molarity of pure water is


4) The solubility of gas in liquid increases with


5) Molality is expressed as


6) Which of the following is not a solution?


7) Solutions with components which obey Raoults law over the entire composition range are called


8) At higher altitudes, the boiling point of water lowers because


9) Which of the following is a colligative property?


10) The example of a solution of liquid in gas is :


11) Which of the following is not the colligative property?


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


13) A pressure cooker reduces cooking time because


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


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


16) Which of the following is not the correct criterion for an ideal solution?


17) Solutions which distill without change in composition or temperature are called


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


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


20) The phenomenon of osmosis was reported by


21) Isotonic solutions are the solutions having the same


22) The boiling point of a solvent containing a non-volatile solute?


23) The colligative properties of a dilute solution depend on


24) Which of the following solutions have lowest freezing point?


25) A molal solution is one that contains one mole of a solute in


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


27) The molal elevation constant is the ratio of elevation in boiling point to


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


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


30) Sea water is converted into fresh water based upon the phenomenon of


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


32) Which of the following statements is true for a solution of chloroform and acetone?


33) Blood has been found to be isotonic with


34) Which of the following 0.1 M aqueous solutions will have the lowest freezing point?


35) Which of the following aqueous molal solutions will have highest freezing point?


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


37) The molal depression constant depends upon


38) Osmotic pressure is measured by


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


40) The law which relates the solubility of a gas to its pressure is called


41) Blood cells retain their normal shape in solution which are


42) Which of the following precipitates acts as semipermeable membrane?


43) The vapour pressure of water depends upon


44) Which of the following statements is wrong?


45) Which of the following statements is not correct?


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


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


48) 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?


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


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


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


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


53) 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


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


55) The amount of solute required to prepare 10 L of a decimolar solution is


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


57) The molality of a solution containing 0.1 mol of a substance in 100 g of water is


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


59) The number of moles of NaCl in 2 L of 3 M NaCl solution is :


60) 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


61) The normality of 10% (weight / volume) acetic acid is


62) 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


63) 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


64) 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 :


65) 5.0 g of glucose (molar mass = 180) is dissolved in 75 g of water. The mass % glucose is


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


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


68) 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


69) What weight of NaOH is required to neutralise 100 ml of 0.1 N HCl?


70) 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


71) 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


72) 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?


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


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


75) 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


76) The molarity of an aqueous solution of NaOH containing 8 g in 2 L of solution is


77) 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


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


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


80) 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?


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


82) Molality of pure ethyl alcohol (density 0.92 g ml) is:


83) A plant cell shrinks when placed in


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


85) 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


86) 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


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


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


89) 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


90) 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?


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


92) 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


93) 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?


94) 5.85 g of NaCl are dissolved in 90 g of water, the mole fraction of NaCl is


95) The normality of a 2.3 M sulphuric acid solution is


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


97) Acetic acid dissolved in benzene shows a molecular mass of


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


99) 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 :


100) 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


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


102) 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


103) When 0.1 mole of glucose is dissolved in 10 mole of water, the vapour pressure of water is


104) The equivalent weight of hydrated oxalic acid and anhydrous oxalic acid differ by


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


106) 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


107) 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


108) 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


109) 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


110) 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


111) 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


112) During depression of freezing point in a solution, the following are in equilibrium


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


114) 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?


115) Equimolar solutions in the same solvent have


116) 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


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


118) Which of the following is not a colligative property?


119) 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


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


121) Molarity of the liquid HCl if density of solution is 1.17 g/cc is


122) 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


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


124) All form ideal solution except


125) The freezing point of 1% solution of sodium carbonate in water will be


126) Which of the following solutions has largest boiling point?


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


128) Which is true for solution with same osmotic pressure at same temperature?


129) Which of the following solutions will have maximum freezing point?


130) The osmotic pressure of a solution is given by the relation


131) Van't Hoff factor (i) for an aqueous solution of an electrolyte is


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


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


134) The freezing point of equimolal aqueous solutions will be highest for


135) A pair of compounds which cannot exist simultaneously in solution


136) 2N - HCl will have the same molar concentration as


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


138) The freezing point of a 0.05 molal solution of a non- electrolyte in water is


139) Equal amount of which of the following will cause greatest cooling


140) Which one of the following pairs of the solution will be isotonic at the same temperature?


141) Which one of the following statement is false?


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


143) An aqueous solution that has the lowest vapour pressure at a given temperature is


144) 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


145) When the solute is present in trace quantities the following expression is used


146) 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


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


148) What is the effect of the addition of sugar on the boiling and freezing points of water?


149) Camphor is often used in molecular mass determination because


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


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


152) Which of the following solutions will have the highest b.p.?


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


154) Which has maximum freezing point


155) The mole fraction of the solute in one molal aqueous solution is


156) The vant Hoff factor (i) accounts for


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


158) A solution of acetone in ethanol


159) During osmosis, flow of water through a semi permeable membrane is


160) 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


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


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


163) Mole fraction of the solute in a 1.00 molal aqueous solution is


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


165) Mixtures corresponding to maximum in boiling point curves show that


166) The number of iodine atoms present in 1 ml of its 0.1 M solution is


167) The solution having highest freezing point is


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


169) 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


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


171) 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


172) The molal depression constant depends upon


173) The normality of 1.8 M phosphoric acid solution is


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


175) The mole fraction of solute in 2.5 m aqueous solution is


176) For a dilute solution, Raoult's law states that


177) Which of the following pair can be separated by fractional distillation?


178) When mercuric iodide is added to the aqueous solution of KI


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


180) The freezing point of equimolar aqueous solution will be highest for


181) The freezing point of 0.05 m solution of a non-electrolyte in water is


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


183) 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


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


185) Among the following substance the lowest vapour pressure is exerted by


186) Molarity of HCl (l) if its density is 1.17 g/ cc


187) which of the following is true ?


188) Raoult's law is obeyed by a binary liquid solution when


189) The molarity of 648 g of pure water is


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


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


192) Which of the following is satisfied by an ideal solution ?


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


194) Units of molality are


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


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


197) The vapour pressure of a solution increases when


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


199) In a mixture , A and B components show negative deviation as


200) In which mode of expression , the concentration of solution remains independent of temperature ?


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


202) 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


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


204) Which of the following is not a colligative property ?


205) 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


206) As a result of osmosis the volume of the solution


207) The osmotic pressure of a dilute solution is directly proportional to the


208) 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


209) Which one has the highest osmotic pressure ?


210) Acetic acid dissolved in benzene shows a molecular mass of


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


212) Pressure cooker reduces cooking time because


213) Which of the following will have the highest f.pt. at one atmosphere ?


214) The osmotic pressure of a solution is given by the relation


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


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


217) 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


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


219) When a sugar solution is slowly frozen, the first solid which separates out is


220) The vapour pressure lowering of a solvent is proportional to


221) In the phenomenon of osmosis through the semipermeable membrane


222) The unit of freezing point depression constant is


223) 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)


224) Assuming 100 % ionization, the increasing order of the freezing point of the solution will be


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


226) 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


227) The osmotic pressure of solution increase if


228) Which of the following method is used for measuring the osmotic pressure of the solution ?


229) 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


230) 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


231) 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 ?


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


233) 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)


234) Camphor is often used in molecular mass determination because


235) The solubility of gas in liquid increases with


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


237) Which of the following statement is correct ?


238) During depression in freezing point of a solution the following are in equilibrium


239) When common salt is dissolved in water


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


241) The freezing point equimolal aqueous solution will be highest for


242) A 0.6 % urea solution is isotonic with


243) During the evaporation of liquid


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


245) Which has minimum osmotic pressure ?


246) Which has highest freezing point ?


247) Which will form maximum boiling point azeotrope ?


248) 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 ?


249) Equimolal solutions in the same solvent have


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


251) 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


252) 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


253) 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 ?


254) A super saturated solution is a metastable state of solution in which solute concentration.


255) Colligative properties of a solution depends upon


256) 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 :


257) Which one is a colligative property?


258) 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


259) Which one of the following aqueous solutions will exhibit highest boiling point?


260) Which is correct representation of phase rule?


261) 40% by weight solution will contain how much mass of the solute in 1L solution, density of the solution is 1.2 g/mL?


262) What is the molality of pure water?


263) Which of the following associated with isotonic solutions is not correct?


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


265) The condition for the validity of Henry’s law are :


266) 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


267) Which is a colligative property ?


268) Vapour pressure of a solvent containing non-volatile solute is :


269) Among the following mixtures, dipole-dipole as the major interaction is present in :


270) The vapour pressure of water depends upon :


271) Which of the following solution highest boiling point?


272) 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


273) 2.5 L of NaCl solution contain 5 moles of the solute.What is the molarity ?


274) 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?


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


276) 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


277) Which of the following is incorrect?


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


279) Lowering in vapour pressure is the highest for:


280) Which is not a colligative property in the following?


281) The normality of 10% (weight/volume) acetic acid is


282) Two solutions have different osmotic pressure. The solution of lower osmotic pressure is called :


283) 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


284) The distribution law holds good for :


285) Which of the following solutions has the highest normality?


286) Which solution would exhibit abnormal osmotic pressure?


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


288) 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?


289) Which of the following shows maximum depression in freezing point?


290) The substances whose solubility decreases with increase in temperature :


291) 3.65 g of HCl is dissolved in 16.2 g of water. The mole fraction of HCl in the resulting solution is


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


293) Choose the correct statement.
When concentration of a salt solution is increased


294) 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)


295) In the case of osmosis, solvent molecules move from :


296) 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?


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


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


299) 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 :


300) 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 :


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


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


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


304) Colligative properties are used for the determination of


305) The natural semipermeable membrane is :


306) The energy that opposes the dissolution of a solute in a solvent is called :


307) 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 :


308) When mercuric iodide is added to the aqueous solution of potassium iodide, the


309) Which statement is wrong for distribution law?


310) 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


311) 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 :


312) The distribution law was given by :


313) Which of the following is incorrect?


314) 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?


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


316) 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


317) 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


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


319) Which of the following is incorrect?


320) 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


321) 5% (wt./vol.) aqueous NaCl solution and 5% (wt./vol.) aqueous KCl solution are :


322) Boiling point of water is defined as the temperature at which :


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


324) 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℃)


325) The molal elevation/depression constant depends upon :


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


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


328) 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?


329) 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


330) Water will boil at 101.5 ͦC at which of the following pressure?


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


332) Beckmann thermometer are used to measure :


333) When a crystal of the solute is introduced into a super saturated solution of the solute :


334) The mole fraction of the solute in one modal aqueous solution is


335) Which of the following solutions will have the highest boiling point ?


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


337) The solubility of a gas in water depends on :


338) Which of the following is not a colligative property?


339) 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?


340) 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 :


341) 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


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


343) 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 :


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


345) A substance will be deliquescent it its vapour pressure is :


346) Which of the following concentration term is/are independent of temperature?


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


348) 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?


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


350) An example of a solution having liquid in gas is:


351) Which of the given solutions has highest osmotic pressure?


352) At high altitude the boiling of water occurs at low temp. because :


353) 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 :


354) Which solution will have least vapour pressure?


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


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


357) Increasing the temperature of an aqueous solution will cause


358) 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 :


359) 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 :


360) 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 :


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


362) The vapour pressure of a dilute solution is not influenced by :


363) 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


364) Molal elevation constant of a liquid is :


365) The solubility of gas in liquid depends upon :


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


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


368) 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?


369) 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)?


370) 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


371) The elevation of boiling point method is used for the determination of molecular weight of:


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


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


374) As a result of osmosis, the volume of the concentrated solution :


375) At a suitable pressure near the freezing point of ice, there exists :


376) Which of the following concentration units is independent of temperature?


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


378) The movement of solvent molecules through a semipermeable membrane is called


379) An aqueous solution of methanol in water has vapour pressure


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


381) 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)


382) Van’t Hoff factor(i):


383) Following solutions at the same temperature will be isotonic :


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


385) Mole fraction of solute in benzene is 0.2 then find molality of solute


386) Which is not applicable to distribution law?


387) 3.0 molal NaOH solution has a density of 1.110 g/mL. The molarity of the solution is


388) Sodium sulphate is soluble in water, while barium sulphate is sparingly soluble because :


389) Distribution law is applicable when :


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


391) 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?


392) Dissolution of a solute is an exothermic process if :


393) Molarity is expressed as


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


395) 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 :


396) 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


397) The solubility order for the following gases is :


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


399) 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


400) Azeotropic mixture of HCl and water has


401) 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 ?


402) Which of the following can be measured by the Ostwald-Walker dynamic method?


403) For dilute solution Raoult’s law states that


404) 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 :


405) The lubricating action of an oil is more if it possess :


406) Maximum lowering of vapour pressure is observed in the case of


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


408) Which of the following concentration factors is affected by change in temperature?


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


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


411) 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 :


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


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


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


415) The process of getting fresh water from sea water is known as :


416) 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


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


418) Which of the following statement is true?


419) 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℃)


420) The vapour pressure of a liquid in a closed container depends upon


421) The vapour pressure of a solution is proportional to :


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


423) 19.85 mL of 0.1 N NaOH reacts with 20 mL of HCl solution for complete neutralization. The molarity of HCl solution is


424) The vapour pressure will be lowest of


425) Which one is correct?


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


427) Which of the following solution in water possesses the lowest vapour pressure?


428) Which of the following solutions will have highest boiling point


429) 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


430) The freezing point of equimolal aqueous solution will be highest for


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


432) Osmotic pressure of a solution at a given temperature


433) 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 :


434) 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


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


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


437) 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


438) The unit of molality is


439) An azeotropic solution of two liquids has boiling point lower than either when it


440) 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


441) 2 N HCl solution will have same molar concentration as a


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


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


444) Normality of 2 M sulphuric acid is


445) 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


446) Generally those gases are soluble in water to a greater extent which :


447) Pressure cooker reduces cooking time for food because


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


449) 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 :


450) On the basis of intermolecular forces predict the correct order of decreasing boiling points of the compounds:


451) Which has the highest freezing point at one atmosphere?


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


453) Which has minimum osmotic pressure?


454) Which of the following solutions will have the highest boiling point?


455) Solubility of solutes which dissolve with the liberation of heat decreases with :


456) 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?


457) 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 :


458) Saturated solution of NaCl on heating becomes :


459) 20 g of hydrogen is present in a 5 L vessel. The molar concentration of hydrogen is


460) The molarity of pure water is


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


462) The condition under which Nernst distribution law will not hold true is :


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


464) Among the following substances, the lowest vapour pressure is exerted by :


465) 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


466) 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


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


468) 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 :


469) The reverse of fusion is freezing and it is :


470) 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 :


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


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


473) The equilibrium in a heterogeneous system can be studied by :


474) 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?


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


476) 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 :


477) The freezing point of the 0.05 molal solution of non-electrolyte in water is


478) 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.


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


480) 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 :


481) 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 :


482) During osmosis, flow of water through a semipermeable membrane is :


483) 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 :


484) The freezing point of 1% solution of lead nitrate in water will be


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


486) Which of the following statements is false?


487) Lowering of vapour pressure is highest for


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


489) 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)


490) Distribution law holds good for the distribution of a dissolved substance between :


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


492) Equimolar solutions of two non-electrolytes in the same solvent should have :


493) 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


494) Which characterises the weak intermolecular forces of attraction in a liquid?


495) 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


496) 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?


497) Equimolar solution in the same solvent have


498) Blood cells retain their normal shapes in solutions which are :


499) Volume of water needed to mix with 10 mL N HCl to get 0.1 N HCl is


500) The solubility of a solid in a liquid depends on :


501) Temperature coefficient is the variation in the :


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


503) 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 :


504) 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 ?


505) 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


506) 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


507) 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?


508) To form a super saturated solution of salt one must :


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


510) 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 :


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


512) Acetic acid on dissolution in benzene will show :


513) Who gave the phase rule?


514) In a mixture of A and B, components show negative deviation when


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


516) 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 :


517) Non- volatile solute when dissolved in water :


518) The energy that favours dissolution of a solute in water is known as :


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


520) In a mixture A and B components show negative deviation as :


521) 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?


522) During depression of freezing point in a solution the following are in equilibrium :


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


524) Distribution law is a special application of ….and vice-versa.


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


526) 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


527) Which of the following solutions will have the highest boiling point ?


528) 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


529) 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


530) If liquids A and B form an ideal solution, the


531) Which has the minimum freezing point?


532) The depression in f.p. is directly proportional to :


533) The vapour pressure will be lowest of


534) Solubility of deliquescent substances in water is generally :


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


536) Which one of the following is not correct for an ideal solution?


537) 1 kg of NaOH solution contains 4 g of NaOH. The approximate concentration of the solution is


538) 6 g urea is dissolved in 90 g water. The relative lowering of vapour pressure is equal to :


539) Which is correct about Henry’s law?


540) 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


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


542) A solution of sulphuric acid in water exhibits :


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


544) Which one is a colligative property?