Question

A reaction is found to be second order w.r.t. one of the reactants & has rate constant of 0.5 mol–1 dm3 min–1. If initial concentration is 0.2 mol dm–3 then t1/2 of reaction is

(a) 5 min

(b) 10 min

(c) 15 min

(d) 20 min

Answer 1

Correct option (b) 10 min

Explanation:

In general t1/2 of reaction ∝ 1/(a0)n - 1

For a second order reaction,