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A solid AB has CsCl-type structure. The ...

A solid `AB` has `CsCl`-type structure. The edge length of the unit cell is `404` pm. Calculate the distance of closest approach between `A^(o+)` and `B^(Θ)` ions.

A

4.0 Å

B

6.4 Å

C

3.5 Å

D

7.0 Å

Text Solution

Verified by Experts

The correct Answer is:
C
Edge length (a)` = 2(r_c + r_a)`
distance between `A^+` and `B^(-) = r_(A^+) + r_(B^-) `
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