Question

Among CaH₂, BeH₂, BaH₂, the order of ioniccharacter is
(1) BeH2 < BaH2 < CaH2
(2) CaH₂ < BeH₂ < BaH₂
(3) BeH₂ < CaH₂ < BaH₂
(4) BaH₂ < BeH₂ < CaH₂

Answer 1

Answer:

Answer is

3)BeH2<CaH2<BaH2.

Explanation:

Smaller the size of cation , more will be its polarising power..

If polarising power is more then its ionic character will decrease.

Relative order of size of cations.

Ba²+ < Ca²+ < Be²+.

Therefore , ionic character will have the order as

Ba²+ > Ca²+ > Be²+.

Hence the answer is,

3)BeH2<CaH2<BaH2.