Q: In α-WCl6
(A) all Cl– ions are present in cubic close packing
(B) W occupies, 1/6th of the octahedral holes.
(C) W occupies 1/3rd of the tetrahedral holes.
(D) All Cl– ions are present in all octahedral
Solution: In α-WCl6, Cl– ions are arranged in cubic close packing, so, there is only one Cl–ion in 1-unit cell. So, the formula can be written W1/6Cl, i.e. 1/6 of the octahedral hole is filled by W.
Ans: (A), (B)