Easy MCQ +4 / -1 PYQ · JEE Mains 2025

For electrons in ' 2 s ' and ' 2 p ' orbitals, the orbital angular momentum values, respectively are:

  1. A 0 and $\sqrt{6} \frac{h}{2 \pi}$
  2. B 0 and $\sqrt{2} \frac{h}{2 \pi}$ Correct answer
  3. C $\sqrt{2} \frac{h}{2 \pi}$ and 0
  4. D $\frac{h}{2 \pi}$ and $\sqrt{2} \frac{h}{2 \pi}$

Solution

<p>The orbital angular momentum for electrons in orbitals is given by the formula:</p> <p>$ \text{Orbital angular momentum} = \sqrt{\ell(\ell+1)} \frac{\mathrm{h}}{2 \pi} $</p> <p>For the 2s orbital, the quantum number $\ell$ is 0:</p> <p>Orbital angular momentum = $\sqrt{0(0+1)} \frac{\mathrm{h}}{2 \pi} = 0$</p> <p>For the 2p orbital, the quantum number $\ell$ is 1:</p> <p>Orbital angular momentum = $\sqrt{1(1+1)} \frac{\mathrm{h}}{2 \pi} = \sqrt{2} \frac{\mathrm{h}}{2 \pi}$</p>

About this question

Subject: Chemistry · Chapter: Atomic Structure · Topic: Bohr's Model

This question is part of PrepWiser's free JEE Main question bank. 122 more solved questions on Atomic Structure are available — start with the harder ones if your accuracy is >70%.

Drill 25 more like these. Every day. Free.

PrepWiser turns these solved questions into a daily practice loop. Chapter-wise drills, full mocks, AI doubt chat. No auto-renew.

Start free →