Question

The rate of first-order reaction is 0.04 mol L^-1 s^-1 at 10 seconds and 0.03 mol L^-1 s^-1 at 20 seconds after initiation of the reaction. The half-life period of the reaction is

(a) 44.1 s

(b) 54.1 s

(c) 24.1 s

(d) 34.1 s

Answer 1

Correct option (c) 24.1 s

Explanation :

For a first order reaction, A → Products and for concentration of the reactant at two different times,