JEE Main 2024 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 4 April 2024, Shift 1, Chemistry Q81

Question 81 of 90 in this shift, Chemistry question 21 of 30, Section B.

The de-Broglie's wavelength of an electron in the

4^{\mathrm{th}}

orbit is ________

\pi a_0

. (

a_0

= Bohr's radius)

Official answer

NTA final key.

Chapter: Structure of Atom
Topic: Bohr's Atomic Theory
Idea tested: Circumference and De Broglie Wavelength

Same idea in other shifts

Asked 3× in all

6 Apr 2023, Shift 2 · Q62If the radius of the first orbit of hydrogen atom is $a_o$ , then de Broglie's wavelength of electron in $3^{rd}$ orbit isEasySingle correct
24 Feb 2021, Shift 1 · Q53A proton and a $\mathrm{Li^{3+}}$ nucleus are accelerated by the same potential. If $\lambda_{\mathrm{Li}}$ and $\lambda_{\mathrm{p}}$ …MediumNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.