$Zn$ reacts with $H_2SO_4$ and $HCl$ to produce hydrogen gas,but it does not produce hydrogen gas with $HNO_3$ because:
- A$NO_3^-$ is reduced in preference to $H_3O^+$
- B$HNO_3$ is a stronger oxidizing agent than $H_2SO_4$ and $HCl$
- C$Zn$ acts as an oxidizing agent when it reacts with $HNO_3$
- DIn the electrochemical series,$Zn$ is placed above hydrogen
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