Question

Consider the given statements about ionic solids of type AB and AB2 that crystallise in a cubic closed packed structure
S: In AB type structure, the co-ordination number of both cation and anion can be equal to 6
Sz: In AB type structure, the co-ordination number of both cation and anion can be equal to 4
Sz: In AB2 type structure, the co-ordination number of A2+ is half times the co-ordination number of B-
Which of the given statements are correct?
a)S, and S

b)S, and S3
c) S, and S3
d)S1, S2 and S3​

Answer 1

Answer-

Calcium fluoride  has cubic structure, where each Ca2+ ion (cation) is surrounded by 8 F− ion and each F− ion (anion) is surrounded by 4 Ca2+ ions. So the coordination number of Ca2+ is 8 and coordination number of F− is 4.

Therefore, in case of AB2 (which have similar crystal structure with CaF2), coordination number of A2+ is 8 and coordination number is B− is 4.

Rock salt has a cubic crystal structure. Here Na= and Cl− have FCC structure . Both cation and anion are surrounded by 6 oppositely charged ions. So the coordination number of each Na+ (cation) and Cl− (anions) is 6.

Answer 2

Answer:

sorry

Explanation:

Don't know the answer