The charge /size ratio of a cation dermines its polarizing power. Which one of the following sequences represents the increasing order of the polarixing power of the cationic species , `K^+ , Ca^+ , 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 , more is the polarizing power .
`:. k^(+) lt Ca^(2+) lt Mg^(2+) lt Be^( 2+)` .