Solid State

The density (in g cm-3) of the metal which forms a cubic close packed (ccp) lattice with an axial distance (edge length) equal to 400 pm is . Use: Atomic mass of metal = 105.6 amu and Avogadro’s constant = 6 1023 mol-1

In a metal deficient oxide sample, MXY2O4 (M and Y are metals), M is present in both +2 and +3 oxidation states and Y is in +3 oxidation state. If the fraction of M2+ ions present in M is 13, the value of X is .

1. 0.25
2. 0.33
3. 0.67
4. 0.75