The charge /size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarising 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 thwe polarzing power
`:. K^(+) lt Ca^(2+) lt Mg^(2+) lt Be^(2+)`