For the reaction Fe2O3 + 3CO ¾® 2Fe + 3CO2 the volume of carbon monoxide required to reduce one mole of ferric oxide is 67.2 dm3

206.    For the reaction Fe2O3 + 3CO ¾® 2Fe + 3CO2 the volume of carbon monoxide required to reduce one mole of ferric oxide is

(A) 22.4 dm3

(B) 44.8 dm3

(C) 67.2 dm3

(D) 11.2 dm3

Answer:: (C)

207.    For the reaction H20 (l) Ý H2O(g) at 373 K and one atmospheric pressure

(A) DH = TDS

(B) DH = DE

(C) DH = 0

(D) DE = 0

Answer:: (A)

208.    For the reaction N2(g) +  O2(g) Ý 2NO(g), the equilibrium constant is K1. The equilibrium constant is K2 for the reaction 2NO(g) + O2(g) Ý 2NO2(g). What is K for the reaction NO2(g) Ý  N2(g) + O2(g)?

(A)

(B)

(C)

(D)

Answer:: (D)

209.    For the reversible reaction A(s) +B(g) Ý C(g) + D(g): DG0 = -350kJ. Which one of the following statements is true?

(A) Equilibrium constant is greater than one.

(B) The entropy change is negative.

(C) The reaction is thermodynamically not feasible.

(D) The reaction should be instantaneous.

Answer:: (A)

210.    Formation of coloured solution is possible when metal ion in the compound contains

(A) paired electrons

(B) unpaired electrons

(C) lone pair of electrons

(D) none of these

Answer:: (B)