Chemistry - Complete d-block Question with Solution | TestHub

$\mathrm{Zn}$ on reaction with $\mathrm{H}\mathrm{N}{\mathrm{O}}_3$
Zinc reacts with the dilute nitric acid to form the nitrous oxide gas. It is also known as the laughing gas.

$4\mathrm{Z}\mathrm{n}+10\mathrm{H}\mathrm{N}{\mathrm{O}}_3\left(\mathrm{dil}\right)\to 4\mathrm{Z}\mathrm{n}{\left(\mathrm{N}{\mathrm{O}}_3\right)}_2+{\mathrm{N}}_2\mathrm{O}+5{\mathrm{H}}_2\mathrm{O}\mathrm{ }$

Zinc reacts with the concentrated nitric acid to form the brown colour nitrogen dioxide gas.
$\mathrm{Z}\mathrm{n}+4\mathrm{H}\mathrm{N}{\mathrm{O}}_3\left(\mathrm{conc}.\right)\to \mathrm{Z}\mathrm{n}{\left(\mathrm{N}{\mathrm{O}}_3\right)}_2+2\mathrm{N}{\mathrm{O}}_2+2{\mathrm{H}}_2\mathrm{O}$