1.

Oxides of sulphur and nitrogen

Answer»

`H_(2)S`
`H_(2)Te`
`H_(2)SE`
`H_(2)O`

Solution :All hydrides except H0 acts as reducing agents, The reducing nature INCREASES as the atomic NUMBER of the central ATOM increases. This is due to weakening of M-H bond as the bond LENGTH increases with increase in size of sulphur and nitrogen.


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