Q63 · CSIR-NET Chemistry, June 2019

Paper: CSIR-NET June 2019 · Subject: Physical Chemistry · Chapter: Chemical Kinetics · Topic: Rate Laws Order · Marks: 2 · Difficulty: Hard

If the half-life of a reaction is inversely proportional to the square of the concentration of the reactant, the order of the reaction is

(a)0

(b)1

(c)2

(d)3

Answer

Answer: D ✓ checked by 4AB · confidence high

The source book printed no answer; this one was worked out and checked — see the explanation.

Explanation

t₁/₂ ∝ [A]₀^{1−n}; ∝ 1/[A]₀² means 1 − n = −2 ⇒ n = 3.

Study loop for Chemical Kinetics