1.

The radius of Ag+ ion is 126pm and of I- ion is 216pm. The coordination number of Ag+ ion is: (a) 2 (b) 3 (c) 6 (d) 8

Answer»

Answer is (c) 6

The radius of Ag+ ion is 126pm and of I- ion is 216pm. The coordination number of Ag+ ion is:

ρ = rcation/ranion = 126/ 216 = 0.58

Radius ratio lies in the range 0.414 – 0.732, so has coordination number 6 or 4 according to the table. 

Since none of the options is 4, so the answer is 6



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