1.

Which one the following is a covalent hydride ?A. `CaH_(2)`B. NaHC. `BH_(3)`D. `BeH_(2)`

Answer» Correct Answer - C
Hydrides are binary ompounds of hydrogen.
These can be calssified into four groups :
(i) lonic hydrides :` NaH, CaH_(2), LiH`
(ii) Covalent hydrides : `B_(2)H_(6), NH _(3), SBH_(3)`
(iii) Polynucles hydrides : `LiAIH_(4), NaBh_(4)`
(iv) Intersitital hydrical are those in which hydrogen is trapped in the interetitial space of transition of transition metals .


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