NCERT Class XII Chemistry
Chapter - The Solid State
Questions with Solutions

As atoms Q are present at the eight corners of the cube, therefore number of atoms of Q in the unit cell =

1

8

×8=1
As atoms P are present at the body-centre, therefore, number of atoms of P in the unit cell = 1
Hence, the formula of the compound is PQ.
Coordination number of each of P and Q = 8