1.

Which pair of substances gives same gaseous product, when these reactwith water

Answer»

Ca and `CaH_(2)`
NA and `Na_(2)O_(2)`
K and `KO_(2)`
BA and `BaO_(2)`

Solution :`Ca+2 H_(2)O to Ca(OH)_(2) +H_(2)`
`CaH_(2) +2H_(2)O to Ca(OH)_(2) +2H_(2)O`


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