a. Ionic bond: The binary hydrides of alkali metals (such as `LiH,NaH,KH` etc.) form ionic nond. they on electrolysis give hydride ion `H^(ɵ)`.
`NaH_(s)+H_(2)O_(aq)toH_(2(g)+NaOH_(aq)`
`Na^(o+)+H^(ɵ)toNaH`
b. Metallic bond: `d-` and `f-` block elements (metals) form metallic bond, Examples: `ScH_(2),YH_(2),LaH_(3)` etc.
c. Covalent bond: With `p`-block elements hydrogen forms covalent bond for expample
