Chemistry · Chemical Kinetics

JEE Main 2025 — 22 January, Morning Shift — Question 27

Which of the following statement is not true for radioactive decay?

Option A:
Amount of radioactive substance remained after three half lives is $\frac{1}{8}$ th of original amount.
Option B:
Decay constant does not depend upon temperature.
Option C:
Decay constant increases with increase in temperature.
Correct
Option D:
Half life is $\ln 2$ times of $\frac{1}{\text { rate constant }}$ .

Answer: C

Step-by-step solution

Decay constant is independent of temperature.

Answer key and solution verified before publishing.

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Exam: JEE Main 2025
Paper: 22 January, Morning Shift
Subject: Chemistry
Chapter: Chemical Kinetics
Topic: Rate Laws and Rate Constant

A arrow B The molecule A changes into its isomeric form B by following a first order kinetics at a temperature of 1000 K . If the energy…

Which of the following statement is not true for radioactive decay? | JEE Main 2025 PYQ with Solution · DhiX AI