JEE Main 2019ChemistrySolid StateMediumMCQ

JEE Main 2019 — Solid State Question with Solution

JEE Main 2019 (09 Jan Shift 2)

Question

At 100oC,  copper Cu has FCC unit cell structure with cell edge length of x Å . What is the approximate density of Cu (in g cm-3 ) at this temperature?

Atomic Mass of Cu=63.55 u

Choose an option

Show full solutionCorrect option: C
Correct answer
C422x3

Step-by-step explanation

Crystal structure is FCC, so number of atoms per unit cell N=4

Edge length =x.Å=x 10-8  cm3

Density ZMNAa3=4×63.56.03×1023x×10-83gm/cm3

=4×63.56.0×x3×10-1=422x3gm/cm3=422x3

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About this question

This is a previous-year question from JEE Main 2019, 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.