Learn

Saturday, 31 October

JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 29 July 2022, Shift 1, Chemistry Q83

Question 83 of 90 in this shift, Chemistry question 23 of 30, Section B.

The minimum uncertainty in the speed of an electron in an one dimensional region of length 2a02a_0 (Where a0a_0 = Bohr radius 52.9 pm) is __________ km s−1\mathrm{km\ s^{-1}}. (Given : Mass of electron = 9.1×10−319.1\times10^{-31} kg, Planck’s constant h = 6.63×10−346.63\times10^{-34} Js)

Official answer

548

NTA final key.

Chapter
Structure of Atom
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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.