Question

Distinguish between

 (i)Hexagonal and monoclinic unit cells 

(ii) Face-centred and end-centred unit cell

Answer 1

(ii) Face-centred unit cell
In a face-centred unit cell, the constituent particles are present at the corners and one at the centre of each face.
End-centred unit cell
An end-centred unit cell contains particles at the corners and one at the centre of any two opposite faces.