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Saturday, 31 October

JEE Main 2021 · ChemistryNumerical answerNumerical valueHardData or graph

JEE Main 3 August 2021, Shift 1, Chemistry Q52

Question 52 of 90 in this shift, Chemistry question 22 of 30, Section B.

A graph of the uncertainty in position against the inverse of the uncertainty in wavelength of an electron is shown. The wavelength of the electron in Å is ________. (Nearest integer) [Assume minimum uncertainty product. Use π = 3.142, Use Δ(g(y)) = | g′(y) | Δy ; where g is an arbitrary function of yy.]

The figure, in words

Graph: vertical axis labelled x in Å, horizontal axis labelled 1/Δλ in Å^-1; a straight line from the origin rising to the right, with the angle between the line and the horizontal axis marked and labelled '= tan^-1(0.318)'.

Official answer

2

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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.