MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

For a zero order reaction, the rate of reaction is independent of the concentration of the reactant. The integrated rate equation for a zero order reaction is given by: [A]_t = -kt + [A]_0 where [A]_t is the concentration of the reactant at time t, [A]_0 is the initial concentration, and k is the rate constant. Comparing this equation with the equation of a straight line y = mx + c, we get: y = [A]_t x = t m = -k c = [A]_0 Thus, plotting the concentration of reactant [A]_t versus time t yields a straight line with a slope of -k. Answer: -k