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Assertion: Face-centred cubic cell has f...

Assertion: Face-centred cubic cell has four atoms per unit cell.
Reason: In fcc unit, there are eight atoms at the corner and six atoms at face centers.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true, but reason is not the correct explanation of assertion.

C

If assertion is true, but reason is false.

D

If both assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
A
The face-centred cubic structure has atoms located at each of the corners and the centres of all the cubic faces. Each of the corner atoms is the corner of another cube so the corner atoms are shared among eight-unit cells. Thus, both assertion and reason are true and reason is the correct explanation of assertion.
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