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All the following substances react with ...

All the following substances react with water. The pair that gives the same gaseous product is

A

`K and CO_3`

B

`Na and Na_2O_2`

C

`Ca and CaH_2`

D

`Ba and BaO_2`

Text Solution

Verified by Experts

The correct Answer is:
C
Ca and `CaH_2` gives `H_2` and calcium hydroxide when reacted with water.
`Ca+H_2O to Ca(OH)_2+H_2 uarr`
`CaH_2 + 2H_2O to Ca(OH)_2+2H_2 uarr`
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