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Q.

The ratio of anion radius to cation radius of a crystal is 10: 9.3. Then, the coordination number of the cation in the crystal is

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a

2

b

8

c

6

d

4

answer is B.

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Detailed Solution

$\frac{π_{a}}{π_{c}} = \frac{10}{9.3} Limiting radius ratio \frac{r_{c}}{r_{a}} = \frac{9.3}{10} = 0.93 cation C . N = 8$

Hence, the correct option (B) .

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