1.

The ionic radii of A^(+) and B^(-)ions are 0.98xx10^(-10)m and 1.81xx10^(-10)m.The co-ordination number of each ion in AB is :

Answer»

4
8
2
6

Solution :`(r^(+))/(r^(-))=(0.98xx10^(-10))/(1.81xx10^(-10))=0.54`
IONIC crystal is octahedral COMPLEX and it.s coordination no is 6.


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