MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

For a zero order reaction, the half-life is given by t_ 1/2 = [A]_0 2k Substituting the given values: 1 = 2.0 2k k = 1.0 mol L ^ -1 hour ^ -1 The integrated rate equation for a zero order reaction is [A]_t = [A]_0 - kt For the concentration to decrease from 0.50 mol L ^ -1 to 0.25 mol L ^ -1 , the time required is: t = [A]_1 - [A]_2 k t = 0.50 - 0.25 1.0 = 0.25 hour