25. AB is rock salt type crystal. If radius of A* is
75 pm then radius of B- will be
(1) 181.2 pm
(2) 333.3 pm
(3) 102.5 pm
(4) 323.5 pm
Answers
Answered by
5
Answer:
B
−
occupies ccp while A
+
occupies alternate tetrahedral voids.
r=0.225R
Where r is the radius of A
+
and R is the radius of B
−
22.5=0.225R
R=100 pm
Hence, the ideal radius of B
−
would be 100 pm.
Hence, the correct option is B
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