JEE Main 2022 · ChemistryNumerical answerNumerical valueEasyCalculation

JEE Main 26 July 2022, Shift 1, Chemistry Q83

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

The wavelength of an electron and a neutron will become equal when the velocity of the electron is

x

times the velocity of neutron. The value of

x

is __________. (Nearest Integer) (Mass of electron is

9.1 \times 10^{-31}

kg and mass of neutron is

1.6 \times 10^{-27}

kg)

Official answer

1758

NTA final key.

Chapter: Structure of Atom
Topic: Matter Waves
Idea tested: Basic Wavelength-Momentum Relation

Same idea in other shifts

Asked 5× in all

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4 Aug 2021, Shift 1 · Q52The wavelength of a tennis ball of mass 57 g travelling at 80 km h $^{-1}$ is ________ $\times 10^{-34}$ m. (Nearest integer) [Use : h =…EasyNumerical value
4 Sep 2020, Shift 1 · Q18Particle A of mass $m_A=\frac{m}{2}$ moving along the $x$ -axis with velocity $v_0$ collides elastically with another particle B at rest…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.