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Q.

The charge/size ratio of cation determines its polarising power. Which one of the following sequence represents the increasing order of the polarising power of the cationicspecies,K+,Ca2+,Mg2+,Be2+?

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a

Mg2+

b

Be2+

c

K+

d

Ca2+

answer is C.

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Detailed Solution

Smaller the cation, larger the charge, larger the polarising power.size                       Be2+
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The charge/size ratio of cation determines its polarising power. Which one of the following sequence represents the increasing order of the polarising power of the cationicspecies,K+,Ca2+,Mg2+,Be2+?