The charge`//`size rato of a cation determines its polarzing power. Which one of the following sequence represents the increasing order of the polarzing power of the catonic species, `K^(+),Ca^(2+),Mg^(2+),Be^(2+)?`

Options

A. `Mg^(2+) lt Be^(2+) lt K^(+) lt Ca^(2+)`
B. `Be^(2+) lt K^(+) lt Ca^(2+) lt Mg^(2+)`
C. `K^(+) lt Ca^(2+) lt Mg^(2+) lt Be^(2+)`
D. `Ca^(2+) lt Mg^(2+) lt Be^(2+) lt K^(+)`

Answer

C

Explanation

Higher the charge`//`size ratio, larger is the polarizing power.
`:. K^(+) lt Ca^(2+) lt Mg^(2+) lt Be^(2+)`.