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