JEE Main 2023ChemistrySolid StateEasyNumerical

JEE Main 2023 — Solid State Question with Solution

JEE Main 2023 (29 Jan Shift 2)

Question

A metal M forms hexagonal close-packed structure. The total number of voids in 0.02 mol of it is _____ ×1021 (Nearest integer)

(Given NA=6.02×1023)

Enter your answer

Show full solutionCorrect answer: 36
Correct answer
36

Step-by-step explanation

From the diagram of voids in HCP:

There are 6 octahedral voids and 12 tetrahedral voids in a HCP unit cell.
One unit cell of HCP contains =18 voids

Thus, No. of voids in 0.02 mol of hcp

=186×6.02×1023×0.02

≈3.6×1022

≈36×1021

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About this question

This is a previous-year question from JEE Main 2023, covering the Solid State chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.