JEE Main 2015ChemistrySolid StateMediumMCQ

JEE Main 2015 — Solid State Question with Solution

JEE Main 2015 (04 Apr)

Question

Sodium metal crystallizes in a body centred cubic lattice with a unit cell edge of 4.29 Å . The radius of sodium atom is approximately:

Choose an option

Show full solutionCorrect option: B
Correct answer
B1.86 Å

Step-by-step explanation

For B.C.C lattice,

4 r = 3 a

where 'r' is radius of atom and 'a' is edge length of unit cell

r = 3 4 a = 1.732 4 × 4.29

= 1.86 Å

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About this question

This is a previous-year question from JEE Main 2015, 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.