1.

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

Answer»

`NH_(4)NO_(3)`
`NH_(4)NO_(2)`
`NH_(4)Cl`
`(NH_(4))_(2)SO_(4)`

Solution :`NH_(4)NO_(3)+NaOHtoNH_(3)+NaNO_(3)+H_(2)O`
`7NaOH+NaNO_(3)+4Znto4Na_(2)ZnO_(2)+NH_(3)+2H_(2)O`
`NH_(4)NO_(2)+NaOHtoNaNO_(2)+NH_(3)+H_(2)O`
`3Zn+5NaOH+NaNO_(2)to3Na_(2)ZnO_(2)+NH_(3)+H_(2)O`
HENCE,(A) and (B) are the correct answers.


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