1.

Zn gives H_(2) gas with H_(2)SO_(4) andHCI but not with HNO_(3)because

Answer»

Zn acts as OXIDISING agent when reacts with `HNO_3`
`HNO_3` is WEAKER acid than `H_2SO_4 and HCl`
Zn is above the HYDROGEN in electrochemical series
`NO_3^(-)` is reduced in preference to `H^(+)` ion

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