Among `CaH_(2),BeH_(2),BaH_(2),` the order of ionic character is

Options

A. `BeH_(2) lt CaH_(2) lt BaH_(2)`
B. `CaH_(2) lt BeH_(2) lt BaH_(2)`
C. `BeH_(2) lt BaH_(2) lt CaH_(2)`
D. `BaH_(2) lt BeH_(2) lt CaH_(2)`

Answer

A

Explanation

`BeH_(2) lt CaH_(2) lt BaH_(2)`
Smaller the size of cation, more will be its polarising power. Hence `BeH_(2)` will be least ionic and `BaH_(2)` is most ionic (According to Fajan's Rule).