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An ionic compound AB has ZnS type of str...

An ionic compound `AB` has `ZnS` type of structure if the radius `A^(+)` is `22.5` pm , then the ideal radius of `B` is

A

54.35 pm

B

100 pm

C

145.16 pm

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
B
Since ionic compound AB has ZnS type of structure it has tatrahedral holes, for which
`("Radius of cation")/("Radius of anion")=0.225`
`(r^(+))/(r^(-))=0.225`
`(22.5)/(r^(-))=0.225`
Hence, `r^(-)=100` pm
Hence, (B) is the correct answer.
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