JEE Main Chemistry question

According to Fajans' rule, polarization is greater when

(A)The cation is small and the anion is largeCorrect
(B)The cation is small and the anion is small
(C)The cation is large and the anion is large
(D)The cation is large and the anion is small

Answer: (A)

Solution

A small, highly charged cation has a strong polarising power (it attracts the electron cloud of a neighbouring ion strongly), while a large anion is more easily polarised (its electron cloud is more loosely held and more easily distorted). The

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Question ID VK-133432