1.

What happens when zinc granules are trated with dilute solutions of H_(2)SO_(4), HNO_(3), NaCl and NaOH ? Also writethe chemical equation.

Answer»

Solution :(i) With dilute `H_(2)SO_(4):H_(2)` gas is evolved.
`Zn+H_(2)SO_(4)rarr ZnSO_(4)+H_(2)UARR`
(ii) With dilute `HNO_(3):H_(2)` gas is evolved.
`Zn+2HNO_(3)rarrZn(NO_(3))_(2)+5H_(2)O+H_(2)uarr`
(III) With dilute NaCl : No Chemical REACTION takes place .
(iv) With dilute NaOH : Sodium Zincate is formed and `H_(2)` gas is evolved .
`Zn+2NaOHrarr Na_(3)ZnO_(2)+H_(2)uarr`


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