Which among the following oxides of nitrogen is brown coloured gas?
Which among the following oxides of nitrogen is brown coloured gas?
$\mathrm{N}_{2} \mathrm{O}_{5}$
$\mathrm{N}_{2} \mathrm{O}_{3}$
$\mathrm{NO}_{2}$
$\mathrm{N}_{2} \mathrm{O}_{4}$
Solution
Nitrogen dioxide is a dark reddish brown gas and dinitrogen tetroxide is a colorless gas. When the equilibrium is shifted to the left, as written, the amount of nitrogen dioxide increases, the amount of dinitrogen tetroxide decreases and the color of the tube darkens.