Question

Which of the following options are the main applications of the nitric acid?

• A. Manufacture of fertilizers
• B. For etching alphabets and pictures on metals
• C. Preparation of aqua regia used for dissolving noble metals
• D. It is used to prepare sulphur dioxide.

Answer 1

Answer: (A), (B), (C)

The correct options are
A

Manufacture of fertilizers

B

For etching alphabets and pictures on metals

C

Preparation of aqua regia used for dissolving noble metals

Nitric acid produces ammonium nitrate which is used for producing fertilizers.
Concentrated nitric acid with concentrated hydrochloric acid is mixed in the ratio 1:3 to make aqua regia which is a solution that can dissolve noble metals like gold and platinum.
Nitric acid is also used for etching alphabets and pictures on metals since it is a very strong acid.

Nitric acid is not used to produce sulphur dioxide gas,$S{O}_2$. Sulphur dioxide gas is produced by burning sulphur in oxygen.