# NEET Chemistry The Solid State Questions Solved

A crystal formula AB3 has A ions at the cube corners and B ions at the edge centres. The coordination number of A and B respectively

(A) 6 and 6

(B) 2 and 6

(C) 6 and 2

(D) 8 and 8

(c) Co-ordination of cation/Co-ordination no of anion

= charge of cation/charge of anion = 3/1 =3

Now Co-ordination no. of A is as shown so of B is 2.

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