Chemical BondingHard

Question

The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizinig order of the polarizing power of the cationic species, K+, Ca2+, Mg2+, Be2+?

Options

A.Mg2+ ,Be2+ ,K+ ,Ca2+
B.Be2+ ,K+ ,Ca2+ ,Mg2+
C.K+ ,Ca2+ ,Mg2+ ,Be2+
D.Ca2+ ,Mg2+ ,Be2+ ,K+

Solution

Higher the charge/size ratio, more is the polarizing power.
∴     K+ < Ca2+ < Mg2+ < Be2+
Hence, (3) is correct.

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