mol-1 that should be dissolved in 114 g of octane to lower its vapour pressure by 20 % is a. 10g b. 11. 4 g c. 9.8 g d. 12. 8 g Ans. a (9)
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
a. Mole fraction of the solvent b. Mole fraction of the solute c. Weight percentage of a solute d Weight percentage of a solvent Ans. b (11)
25° C. It forms an ideal solution with ‘B’ in which mole fraction of A is 0.8. if the vapour pressure of the solution is 84 mm of Hg at 25° C , the vapour pressure of pure ‘B’ at …
a. 140 torr b. 20 torr c. 68 torr d. 72 torr Ans. d (56)
20° C is 17.5 mmHg. if 18 g of glucose is added to 178.2 g of water at 20° C the vapour pressure of the resulting solution will be a. 15.750 mm Hg b. 16.500 mm Hg c. 17.325 …
a. Lowering of vapour pressure b.Elevation in boiling point c. Depression of freezing point d. Osmotic pressure Ans. d (3)
a. 1 m K [ Fe (CN)6 ] solution b. 1 m C6 H12 O6 solution c. 1 m KCl solution d. 1 m rock salt solution Ans. b (23)
a. Lower b. Higher c. Both d.None Ans. a (4)
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
20° C, the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The partial vapour pressure of benzene at 20° C, for a solution containing 78 g of benzene and 46 g of toluene in …
a. Two different solutions of sucrose of same molality prepared in different solvents will have the same depression in freezing point b. The osmotic pressure of a solution is given by the equation π = CRT c. Decreasing order of …
κPa abd 45 κPa respectively. Vapour pressure of the solution obtained by mixing 25.0g of heptane and 35 g of octane will be a. 144.5 κPa b. 72.0 κPa c. 36.1 κPa d. 96. 2 κPa Ans. b (41)
a. 0.6 b. 0.5 c. 0.8 d. 0.4 Ans. d Explanation : In equimolar liquid mixture x = 0.5 x = 0.5 So, P = 0.5 x 150 + 0.5x 100 = 125 Now let y be the mole fraction …
a. Vapour pressure of the solvent b. Relative lowering of vapour pressure c. Lowering of vapour pressure d. All of these Ans. b Explanation : Ostwald-Walker dynamic method is used for measurement of relative lowering of vapour pressure. (9)
a. 250 mm, 550 mm b. 350 mm, 450 mm c. 350 mm, 700 mm d. 500 mm, 500 mm e. 550 mm, 250 mm Ans. e (11)
a. 0.8 b. 0.6 c. 0.4 d. 0.2 Ans. b (7)
Po , the vapour pressure of solution is a. 0.10 Po b. 1.10 Po c. 0.90 Po d. 0.99 Po Ans. c (7)
a. 49.50 b. 59.6 c. 69.5 d. 79.8 Ans. c (36)
a. 200 and 300 b. 300 and 400 c. 400 and 600 d. 500 and 600 Ans. c (4)
25° C are 200 mm Hg and 41.5mm Hg respectively. Vapour pressure of the solution obtained by mixing 25.5g of CHCl3 and 40g of CH2 Cl2 at the same temperature will be (Molecular mass of CHCl3 = 119.5u and molecular …
CCl4 at 25° C is 143 mm of Hg. 0.5 g of a non-volatile solute is dissolved in 100 mL. CCl4 . Find the vapour pressure of the solution a. 141.93 mm b. 94.39 mm c. 199.34 mm d. 143.99 …
( x M = Mole fraction of ‘M’ in solution; xN = Mole fraction of ‘N’ in solution; yM = Mole fraction of ‘M’ in vapour phase; yN = Mole fraction of ‘N’ in vapour phase) a. xM/xN < yM / yN b. (yM – yM ) …
a. Molar Mass b. Equivalent weight c. Arrangement of molecules d. Melting point and boiling point e. Both (a) and (b) Ans.a (6)
a. 0.005 b. 0.010 c. 0.100 d. 0.900 Ans. c (13)
a. An increase in the boiling point of the solution b. a decrease in the boiling point of solvent c. The solution having a higher freezing point than the solvent d. The solution having a lower osmotic pressure than the …
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
a. 0.1 M KNO3 b. 0.1 M Na3 PO4 c. 0.1 M BaCl2 d. 0.1 M K2 SO4 Ans. b (36)
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
a. Henry law b. Dulong and petit law c. Raoult’s law d. Le – Chatelier’s principle Ans. c (20)
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
(a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion …
H2 SO 3 as, NaClO + H2SO 3 → NaCl + H2 SO4 . A solution of NaClO used in the above reaction contained 15 g of NaClO per litre. The normality of the solution would be a. 0.8 b. …