Question

Which of the following statements is correct in the rock-salt structure of an ionic compounds? 

(A) Coordination number of cation is four whereas that of anion is six. 

(B) Coordination number of cation is six whereas that of anion is four. 

(C) Coordination number of each cation and anion is four. 

(D) Coordination number of each cation and anion is six

Answer 1

Correct option  (D) Coordination number of each cation and anion is six.

Explanation:

(a) False each has co-ordination number = 6 

(b) False 

(c) False 

(d) True Both should have equal co-ordination number