For a first order reaction A 5 → 5 B 2 , the concentrations vs time plot is as shown. The half-life of the reaction is

Step-by-step solution

The half-life of a reaction is the time required for the reactant concentration to decrease to one-half its initial value. The half-life of a first-order reaction is a constant that is related to the rate constant for the reaction: t 1 2   =   0 . 693 / k . k = 2 . 303 t log a a - x                                               A 5 → 5 B 2 initial :           &#