JEE Main 2021ChemistrySolid StateMediumNumerical

JEE Main 2021 — Solid State Question with Solution

JEE Main 2021 (22 Jul Shift 1)

Question

A copper complex crystallising in a CCP lattice with a cell edge of 0.4518 nm has been revealed by employing X-ray diffraction studies. The density of a copper complex is found to be 7.62 g cm-3. The molar mass of copper complex is       gmol-1
(Nearest integer): [ Given :NA=6.022×1023 mol-1]

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Show full solutionCorrect answer: 106
Correct answer
106

Step-by-step explanation

dgmcc=4×MNA(a cm)3
7.62=4×M/6.022×10230.4518×10-7 cm3⇒M=105.8 g/mol

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About this question

This is a previous-year question from JEE Main 2021, 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.