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The charge/size ratio of a cation determ...

The charge/size ratio of a cation determines its polarizinf power. Which one of the following sequences represents the increasing order of the polarizing power of the cationic species `K^(+),Ca^(2+),Mg^(2+),Ba^(2+)` ?

A

`K^(+) gt Ca^(2+) gt Mg^(2+) lt Be^(2+)`

B

`Be^(2+) lt Ca^(2+)lt Mg^(2+) lt K^(+)`

C

`Mg^(2+) lt K^(+)lt Be^(2+) lt Ca^(2+)`

D

`K^(+) lt Ca^(2+) lt Mg^(2+) lt Be^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
D
Smaller the size and higher the charge, more will be polarizing power of the cation. Since the order of the size of cation is `K^(+) gt Ca^(2+) gt Mg^(2+) gt Be^(2+)` the correct of polarizing power is `K^(+) lt Ca^(2+) lt Mg^(2+) lt Be^(2+)`
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