Answer: 4. 3 Key idea: count the body-centred (I) cells among the 14 Bravais lattices. Cubic: primitive, body-centred, face-centred (1 body-centred) Tetragonal: primitive, body-centred (1) Orthorhombic: primitive, body-centred, face-centred, end-centred (1) Monoclinic: primitive, end-centred (0) Triclinic, hexagonal, rhombohedral: primitive only (0) Total body-centred cells = 1 + 1 + 1 = 3.

Topic: System, surroundings, extensive/intensive properties, state functions, processes· Chemical Thermodynamics

The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is :

1. 7

2. 5

3. 2

4. 3

Doubtly Asked 30 Oct 2026 NEET UG 2021 neet Save WhatsApp Report

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Answer: 4. 3

Key idea: count the body-centred (I) cells among the 14 Bravais lattices.

Cubic: primitive, body-centred, face-centred (1 body-centred)
Tetragonal: primitive, body-centred (1)
Orthorhombic: primitive, body-centred, face-centred, end-centred (1)
Monoclinic: primitive, end-centred (0)
Triclinic, hexagonal, rhombohedral: primitive only (0)

Total body-centred cells = 1 + 1 + 1 = 3.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is :

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