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

Options

A. `NO_3^(-)` is reduced in preference to `H_3O^(+)`
B. `HNO_3` is weaker acid than `H_2SO_4` and HCl
C. Zn acts as oxidising agent when reacts with `HNO_3`
D. In electrochemical series Znis placed above the hydrogen

Answer

A

Explanation

Zn is present above `H_2` in electrochemical series. So, it liberates hydrogen gas from dilute `HCl//H_2SO_4`. But `HNO_3` is oxidizing agent. The hydrogen obtained in this reaction is converted into `H_2O" in " HNO_3, NO_3^(-)` ion is reduced and give `NH_4NO_3, N_2O, NO and NO_2`
(based upon the concentration of `HNO_3`)