Q81 · CSIR-NET Chemistry, June 2015

Paper: CSIR-NET June 2015 · Subject: Physical Chemistry · Chapter: Chemical Kinetics · Topic: Arrhenius Activation · Marks: 2 · Difficulty: Medium

According to transition state theory, the temperature-dependence of pre-exponential factor (A) for a reaction between a linear and a non-linear molecule, that forms products through a nonlinear transition state, is given by
(a)T
(b)$\mathrm{T}^{2}$
(c)$\mathrm{T}^{-2}$
(d)$\mathrm{T}^{-1.5}$
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
TST: (kT/h) × translation T^{3/2}/T³ × rotation T^{3/2}/(T·T^{3/2}) = T^{1 − 3/2 − 1} = T^{−3/2}.

Study loop for Chemical Kinetics

1. Practise the PYQsPrevious-year questions, with answers

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