Learn

Friday, 9 October

JEE Main 2023 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 11 April 2023, Shift 1, Chemistry Q82

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

An 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 present in one unit cell of A is __________. (Nearest integer) Given the density of A is 3.0 g mL−13.0\ \mathrm{g\ mL^{-1}} and NA=6.02×1023 mol−1\mathrm{N_A} = 6.02\times10^{23}\ \mathrm{mol^{-1}}

Official answer

4

NTA final key.

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

Same idea in other shifts

Asked 2× in all
  1. 28 Jul 2022, Shift 1 · Q82An element M crystallises in a body centred cubic unit cell with a cell edge of 300 pm. The density of the element is…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.