JEE Main 2013 — Solid State Question with Solution
JEE Main 2013 (09 Apr Online)
Question
An element having an atomic radius of crystallizes in an unit cell. What is the length of a side of the cell ?
Choose an option
Show full solutionCorrect option: D
Correct answer
D
Step-by-step explanation
For a fcc unit cell
$\begin{aligned}
& r=\frac{\sqrt{2} a}{4} \\
& a=\frac{4 r}{\sqrt{2}}=2 \sqrt{2} \times 0.14=0.39 \approx 0.4 \mathrm{~nm}.
\end{aligned}$
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This is a previous-year question from JEE Main 2013, 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.