The concentration (C) of a compound undergoing decomposition as a function of time (t) is given below: The order of the reaction is Options:

Q121 · CSIR-NET Chemistry, December 2019

Paper: CSIR-NET December 2019 · Subject: Physical Chemistry · Chapter: Chemical Kinetics · Topic: Chemical Kinetics – General · Marks: 2 · Difficulty: Hard

The concentration $(\mathrm{C})$ of a compound undergoing decomposition as a function of time $(\mathrm{t})$ is given below:

t/min	0	1	2	4	6
C/M	1.00	0.80	0.67	0.50	0.40

The order of the reaction is Options:

(a)0

(b)1

(c)2

(d)3

Answer

Answer: C ✓ checked by 4AB · confidence high

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

Explanation

1/C = 1.00, 1.25, 1.49, 2.00, 2.50 at t = 0, 1, 2, 4, 6 min — linear in t with slope 0.25 M⁻¹ min⁻¹, so the reaction is second order (option 2).

Study loop for Chemical Kinetics

1. Practise the PYQsPrevious-year questions, with answers

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