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Friday, 9 October

JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumMulti-step

JEE Main 28 July 2022, Shift 1, Chemistry Q82

Question 82 of 90 in this shift, Chemistry question 22 of 30, Section B.

An element M crystallises in a body centred cubic unit cell with a cell edge of 300 pm. The density of the element is 6.0 g cm−36.0\ \mathrm{g\,cm^{-3}}. The number of atoms present in 180 g of the element is __________ ×1023\times10^{23}. (Nearest integer)

Official answer

22

NTA final key (2022 Session 2).

Chapter
The Solid State
Topic
Crystal Lattices
Idea tested
Unit Cell Density

Same idea in other shifts

Asked 2× in all
  1. 11 Apr 2023, Shift 1 · Q82An atomic substance A of molar mass 12 g mol−112\ \mathrm{g\ mol^{-1}} has a cubic crystal structure with edge length of 300 pm. The no. of atoms…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 42 of the 174 JEE Main shifts held from 2017 to 2026.