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JEE Main 202522 JanuaryMorning Shift
Exam
JEE Main
Year
2025
Date
22 January
Shift
Morning Shift
Subject
Chemistry
Chapter
Chemical Kinetics

JEE Main 2025 · 22 January · Morning Shift · Chemistry · Chemical Kinetics

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

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

Options

  1. ADecay constant increases with increase in temperature.
  2. BAmount of radioactive substance remained after three half lives is 18\frac{1}{8} th of original amount.
  3. CDecay constant does not depend upon temperature.
  4. DHalf life is ln⁡2\ln 2 times of 1 rate constant \frac{1}{\text{ rate constant }}.

Correct answer

A. Decay constant increases with increase in temperature.

Step-by-step solution

For radioactive decay, decay constant does not depend upon temperature because for radioactive decay activation energy is zero.
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