JEE Main 2017 · ChemistryMultiple choiceSingle correctEasyCalculation

JEE Main 2 April 2017 (offline), Chemistry Q35

Question 35 of 90 in this shift, Chemistry question 5 of 30.

A metal crystallises in a face centred cubic structure. If the edge length of its unit cell is 'a', the closest approach between two atoms in metallic crystal will be :

(1) $\sqrt{2}\,a$
(2) $\frac{a}{\sqrt{2}}$ Official answer
(3) $2a$
(4) $2\sqrt{2}\,a$

Official answer

Option 2

CBSE answer key (25/04/2017, used for result).

Chapter: The Solid State
Topic: Crystal Lattices
Idea tested: FCC Neighbor Distances

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Question text from the official JEE Main paper published by NTA (CBSE ran the 2017 exam); answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.