CBSE
What is the co-ordination number of body centred cube ?
8
6
4
12
A compound is formed by cation C and anion A. The anions form hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is :
C3A2
C3A4
C4A3
C2A3
The number of carbon atoms per unit cell of diamond unit cell is
4
8
6
1
A metal has a fcc lattice. The edge length of the unit cell is 404 pm. The density of the metal is 2.72 g cm3. The molar mass of the metal is (NA vogadro's constant = 6.02x 1023 mol-1).
40 g mol-1
30 g mol-1
27g mol-1
20 g mol-1