198) The internal energy change when a system goes from A to B is 40 kJ⁄mol. If the system goes from A to B by a reversible path and returns to state A by an irreversible path, what would be the net change in internal energy?

199) In which of the following, the reaction proceeds towards completion?

200) At 1000 K, the K_p for the reaction of CO₂ (g) with excess of graphite to form CO (g) is 9 atm. Then the mole % of CO in the equilibrium mixture of gases is:

201) On addition of positive catalyst to a reaction system undergoing reversible reaction:

202) The equilibrium constant of a reaction is 20. At eqilibrium, the rate constant of forward reaction is 10. The rate constant for backward reaction is: