`Zn` gives `H_(2)` gas with `H_(2)SO_(4)` and `HCl` but not with `HNO_(3)` because

Options

A. Zn acts as an oxidising agent when reacts with `HNO_(3)`
B. `HNO_(3)` is weaker acid than `H_(2)SO_(4)` and HCl
C. in electrochemical series, Zn is above hydrogen
D. `NO_(3)^(-)` ion is reduced in prefence to hydronium ions

Answer

D

Explanation

`Zn+2HClrarrZnCl_(2)+H_(2)`
`Zn+H_(2)SO_(4)(dil.)rarrZnSO_(4)+H_(2)`
With dil. `HNO_(3)Zn` produce oxide `(N_(2)O)`.`4Zn+10HNO_(3)rarr4Zn(NO_(3))+N_(2)O+5H_(2)O`
In this reaction of zinc with HCl or dil. `H_(2)SO_(4),H_(3)O^(+)` ion get reduced to `H_(2)`. In the reaction of Zn with dil. `HNO_(3), NO_(3)^(-)` ions are reduced to `N_(2)O` in preference to hydronium ions .