Q75 · CSIR-NET Chemistry, June 2019

Paper: CSIR-NET June 2019 · Subject: Physical Chemistry · Chapter: Solid State Chemistry · Topic: Crystal Systems Lattices · Marks: 2 · Difficulty: Easy

Nearest neighbour distance in a crystal system of side length a is $\frac{a}{\sqrt{2}}$ in
(a)Face-centered cube
(b)Body-centered cube
(c)Trigonal primitive
(d)Primitive cube
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
Nearest neighbours in fcc lie along the face diagonal at a/√2; bcc has a√3/2, simple cubic a.

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