Q93 · CSIR-NET Chemistry, June 2013

Paper: CSIR-NET June 2013 · Subject: Physical Chemistry · Chapter: Solid State Chemistry · Topic: Crystal Systems Lattices · Marks: 2 · Difficulty: Easy

The coordinates for the atoms in a body centred cubic unit cell are

(a)(0, 0, 0) and (1/2, 0, 0)

(b)$(0,0,0)$ and $(1 / 2,1 / 2,1 / 2)$

(c)(0, 0, 0) and (0, 1/2, 0)

(d)(0, 0, 0) and (0, 0, 1/2)

Answer

Answer: B ✓ checked by 4AB · confidence high

The source book printed C; on checking, B is correct — see the explanation.

Printed C (0,½,0) is a face-edge point, not the body centre.

Explanation

Body-centred cubic: lattice points at (0,0,0) and the body centre (½,½,½).

Study loop for Solid State Chemistry

1. Practise the PYQsPrevious-year questions, with answers

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