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
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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.
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