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A solution of colourless salt on boiling...

A solution of colourless salt on boiling with excess `NaOH` produces a non-flammable gas. The gas evolution ceases after sometime upon addition of `Zn` dust to the same solution, the gas evolution restarts. The colourless salt (s) is (are).

A

`NH_(4)NO_(3)`

B

`NH_(4)NO_(2)`

C

`NH_(4)CI`

D

`(NH_(4))_(2)SO_(4)`

Text Solution

Verified by Experts

The correct Answer is:
a,b
`NH_(4)ON_(3) + NaOH rarr NH_(3) + NaNO_(3) + H_(2)O`
`7NaOH + NaNO + 4Zn rarr 4Na_(2)ZnO_(2) + NHO_(3) + 2H_(2)O`
`NH_(4)ON_(2) + NaOH rarr NaNO_(2) + NH_(3) + H_(2)O`
`3Zn + 5NaOH + NaNO_(2) + rarr 3Na_(2)ZnO_(2) + NH_(3)O`
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