6.In rock salt structure what percentage of the octahedral voids are occupied by cations?

7.The maximum proportion of volume available in FCC arrangement of spheres is

8.Which of the following compounds is an example of network solid?

9.The number of octahedral and tetrahedral voids per sphere in a cubic close packed arrangement is respectively.

10.A simple cubic lattice consists if eight identical spheres of Radius R in contact, placed at the corners of the cube, what fraction of the total volume of cube is actually occupied by the cube?