The rate constant of a reaction is 2.5 × 10–2 minutes–1. The order of the reaction is

We can identify unit from order of the reaction as For zero-order reaction, 1 1 mol L k R time First order reaction, 1 k = time Second order reaction, 1 1 mol L k time Third order reaction, 2 2 1 mol L k time CHEMICAL KINETICS 12 So, comparing given unit in question i.e., minutes-1 we can say, order of reaction is 1.