The coordination number of Al in the crystalline state of AlCl3 is .... (IIT-JEE 2009)

AlCl3 exist in CCP unit cell with 6 co-ordinate layer structure and coordination number of Al is (6)

The number of hexagonal faces that are present in truncated octahedron is .... (IIT-JEE 2011)

The number of hexagonal faces that are present in truncated octahedron is  (6) this can seen if given fig.

In Diamond Carbon atom occupie FCC lattice point as well as alternate tetrahedral voids. If edge length of unit cell is 3.56 pm the find the radius of carbon atom is.