Question

Give reasons for each of the following:

All glass apparatus is used in the laboratory preparation of ${\mathrm{H}\mathrm{N}\mathrm{O}}_3$.

Answer 1

Corrosion: When metal comes into contact with water or air, oxygen, or some other corrosive chemical then metals corrodes. This process is called corrosion.

• In the corrosion process metal forms metal oxides.
• For example, rusting of iron
• Nitric acid is corrosive in nature.
• They can react with a rubber cork or plastic.
• Thus, The apparatus used for the laboratory preparation of nitric acid is made of glass completely because the vapours of nitric acid are highly corrosive.