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. 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. Henry law b. Dulong and petit law c. Raoult’s law d. Le – Chatelier’s principle Ans. c (20)
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. …
a. Osmotic pressure b. Boiling point c. vapour pressure d. Freezing point Ans. a (14)
a. 0.004 b. 0.008 c. 0.012 d. 0.016 Ans. d (7)
CCl4 of 1.60 g/ml a. 0.250 m b. 0.500 m c. 0.750 m d. 0.840 m e. 1.69 m Ans. b (10)
a. 1.14 mol kg -1 b. 3.28 mol kg -1 c. 2.28 mol kg -1 d.0.44 molkg -1 Ans. c (9)
H 2 SO4 . The density of the solution is 1.84 g/ml a. 10.43 b. 20.36 c. 12.05 d. 14.05 Ans. a (5)
a. Nature of solute particles present in it b. Nature of solvent used c. Number of solute particles present in it d. Number of moles of solvent only Ans. c Explanation : Colligative properties of a solution not depend upon …
a. Same boiling point but different freezing point b. Same freezing point but different boiling point c. Same boiling and same freezing points d. Different boiling and different freezing points Ans. c Explanation : Depression in freezing point and elevation …
a. 13.88 x 10 -3 b. 13.88 c. 13.88 x 10-2 d. 13.88 x 10-1 Ans. b (10)
H2 O. Mole fraction of NaOH in solution and molality of the solutions respectively are : a. 0.2, 11. 11 b. 0.167, 11. 11 c. 0.167, 22. 20 d. 0.2, 22.20 Ans. b (9)
a. 12.5mL b. 75 mL c. 50 mL d. 25mL Ans. d (2)
Na+ ions per kilogram of water. The molality of Na+ ions in that solution in mol kg-1 is : a. 16 b. 12 c. 8 d. 4 Ans. d (55)
a. Molality b. Molarity c. Mole fraction d. Weight percentage Ans. b Explanation : Molarity has volume term in its expression and volume is temperature dependent. (9)
a. 2.778 b. 5 c. 10 d. 2.5 Ans. a (7)
CH3 OH , is supplied. What is the mole fraction of methly alcohol in the solution a. 0.100 b. 0.190 c. 0.086 d. 0.050 Ans. c (6)
a. 1 b. 18 c. 55.5 d None of these Ans. c Explanation : Molality is defined as the no. of moles per 1000 gmof solvent. m = 1000/18 = 55.5 (14)
H2 SO4 is 18 M. Its density is 1.8 g/mL. Hence molality is a. 36 b. 200 c. 500 d. 18 Ans. c (6)
1g mL-1 , the concentration of sucrose in the solution in mol L-1 is: a. 0.01 b. 0.1 c. 1.0 d. 10 Ans. b (21)
a. Mole fraction b. Normality c. Molality d. None of these Ans.a (15)
a. 0.1 m b. 1 M c. 0.5m d. 1 m Ans.d (10)
gL-1 . The molality of this solution is a. 2.79 b. 1.79 c. 0. 79 d. 2.98 Ans. a (14)