For a completely reversible first-order reaction taking place with a forward rate constant and backw — Chemical Kinetics Chemistry Question

💡 Solution & Explanation

A and B are core derivations for opposing first-order reactions; the system approaches equilibrium with an apparent rate constant equal to the sum of forward and backward constants ($k_{effective} = k_f + k_b$). C is false because the time to reach any state relies on both $k_f$ and $k_b$. D is the fundamental kinetic definition of the equilibrium constant.