JEE Main 2023 · ChemistryMultiple choiceSingle correctEasyCalculation

JEE Main 13 April 2023, Shift 1, Chemistry Q61

Question 61 of 90 in this shift, Chemistry question 1 of 30, Section A.

The energy of an electron in the first Bohr orbit of hydrogen atom is

-2.18\times10^{-18}

J. Its energy in the third Bohr orbit is_________.

(1)One third of this value
(2) $\frac{1}{9}$ th of this valueOfficial answer
(3)Three times of this value
(4) $\frac{1}{27}$ of this value

Official answer

Option 2

NTA final key.

Chapter: Structure of Atom
Topic: Bohr's Atomic Theory
Idea tested: Total, Kinetic, and Potential Energy

Same idea in other shifts

Asked 4× in all

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24 Feb 2021, Shift 2 · Q31According to Bohr's atomic theory : (A) Kinetic energy of electron is $\propto \frac{Z^2}{n^2}$ . (B) The product of velocity (v) of…MediumSingle correct

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.