JEE Main 2020ChemistrySolid StateEasyMCQ

JEE Main 2020 — Solid State Question with Solution

JEE Main 2020 (05 Sep Shift 1)

Question

A diatomic molecule X2 has a body-centred cubic (bcc) structure with a cell edge of 300 pm. The density of the molecule is 6.17 gcm-3. The number of molecules present in 200 g of X2 is :
(Avogadro constant NA=6×1023mol-1)

Choose an option

Show full solutionCorrect option: C
Correct answer
C4 NA

Step-by-step explanation

For BCC z=2

d=Z×MNA× Volume 

6.17=2×M6.02×1023×3×10-83

6.17=2×M6.02×2.7

M=50

No. of mole =20050=4

No. of molecule =4 NA

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About this question

This is a previous-year question from JEE Main 2020, 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.