Physics · Nuclear Physics

JEE Main 2026 — 23 January, Evening Shift — Question 35

Which of the following pair of nuclei are isobars of the element?

Option A:
${ }_{1}^{2} \mathrm{H}$ and ${ }_{1}^{3} \mathrm{H}$
Option B:
${ }_{92}^{236} \mathrm{U}$ and ${ }_{92}^{238} \mathrm{U}$
Option C:
${ }_{80}^{198} \mathrm{Hg}$ and ${ }_{79}^{197} \mathrm{Au}$
Option D:
${ }_{1}^{3} \mathrm{H}$ and ${ }_{2}^{3} \mathrm{H}$
Correct

Answer: D

Step-by-step solution

Isobars are nuclei that have the same mass number ${ }_{1}^{3} \mathrm{H} \&{ }_{2}^{3} \mathrm{He}$ have same mass number.

Answer key and solution verified before publishing.

Practise Nuclear Physics

Start with this question, then two more from the same chapter — with a tutor that explains every step. Free.

Solve a similar one free

Exam: JEE Main 2026
Paper: 23 January, Evening Shift
Subject: Physics
Chapter: Nuclear Physics
Topic: Introduction to Nucleus and its constituents

The average energy released per fission for the nucleus of 92^235 U is 190 MeV . When all the atoms of 47 g pure 92^235 U undergo fission…

Which of the following pair of nuclei are isobars of the element? | JEE Main 2026 PYQ with Solution · DhiX AI