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Polarisability and Fajan's Rule

cation and an...

Question

cation and anion favour least covalent character.

A

Small,large

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B

Large,small

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C

Large,large

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D

Small,small

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Solution

The correct option is B Large,small
According to Fajan's rules of polarization, small the size of anion, more easily it will be polarized and hence, the compound will be least covalent. Large the size of cation, more will be it's polarizing power and hence, compound will be least covalent.

Hence option B is the correct answer.

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