A) \[\text{ }\!\!~\!\!\text{ LiF}\]
B) \[\text{CsF}\]
C) \[CsI\]
D) \[LiI\]
Correct Answer: C
Solution :
Ionic radii is the distance between the nucleus of an ion and a point upto which the nucleus has its influence on its electron cloud. The size of ions increases on moving from top to bottom in a group. Hence, the maximum distance between the centres of cations and anions is in\[\text{CsI}\]because \[\text{C}{{\text{s}}^{+}}\]is the largest cation and \[{{\text{I}}^{-}}\]is the largest anion.
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