Q92.In which of the following reactions, increase in the volume at constant temperature does not affect the number of moles at equilibrium (1) 2NH3 →N2 + 3H2 (2) C(g) + (1/2)O2( g) →CO(g) (3) H2( g) + O2( g) →H2O2( g) (4) none of these

Q93.For the reaction CO(g) + (1/2)O2( g) = CO2( g), Kp/Kc is (1) RT (2) (RT)−1 (3) (RT)−1/2 (4) (RT)1/2 Q94.1 M NaCl and 1 M HCl are present in an aqueous solution. The solution is (1) not a buffer solution with pH < 7 (2) not a buffer solution with pH > 7 (3) a buffer solution with pH < 7 (4) a buffer solution with pH > 7

Q95.The correct relationship between free energy change in a reaction and the corresponding equilibrium constant Kc is (1) −ΔG = RT ln Kc (2) ΔG0 = RT ln Kc (3) −ΔG0 = RT In Kc (4) ΔG = RT ln Kc

Q97.For the reaction equilibrium N2O4( g) ⇌2NO2( g) the concentrations of N2O4 and NO2 at equilibrium are 4.8 × 10−2 and 1.2 × 10−2 mol L−1 respectively. The value of Kc for the reaction is (1) 3 × 10−1 mol L−1 (2) 3 × 10−3 mol L−1 (3) 3 × 103 mol L−1 (4) 3.3 × 102 mol L−1