53. The van’t Hoff factor (i) for a dilute aqueous solution of the strong electrolyte barium hydroxide is

(A) 0

(B) 1

(C) 2

(D) 3

54. The percentage of pyridine C^{5}H^{5}N that forms pyridinium ion C^{5}H^{5}N^{+}H in a 0.10 M aqueous pyridine solution (Kb for C^{5}H^{5}N = 1.7 x 10^{-9}) is

(A) 0.0060%

(B) 0.013%

(C) 0.77%

(D) 1.6%

54. The percentage of pyridine C^{5}H^{5}N that forms pyridinium ion C^{5}H^{5}N^{+}H in a 0.10 M aqueous pyridine solution (Kb for C^{5}H^{5}N = 1.7 x 10^{-9}) is

56. If the E°_{cell} for a given reaction has a negative value, which of the following gives the correct relationships for the values of ΔG° and K_{eq}?

(A) ΔG° > 0; K_{eq} < 1

(B) ΔG° > 0; K_{eq} < 1

(C) ΔG° > 0; K_{eq} < 1

(D) ΔG° > 0; K_{eq} < 1

57. Which one of the following is incorrect for ideal solution?

59. Suppose the elements X and Y combine to form two compounds XY_{2} and X_{3}Y_{2}. When 0.1 mole of XY_{2} weighs 10 g and 0.05 mole of X_{3}Y_{2} weighs 9 g, the atomic weights of X and Y are

(A) 40, 30

(B) 60, 40

(C) 20, 30

(D) 30, 20

60. The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 seconds is (charge on electron = 1.60 x 10^{-19} C)