Question

For which of the following hydrochloric acid is not used:

Options

• Manufacture of metal chloride

• Preparation of TNT

• Preparation of aqua regia

• Extraction of glue from bones

Answer 1

Preparation of TNT

Explanation:

Trinitrotoluene (TNT) is an explosive prepared by nitrating toluene using a mixture of concentrated nitric acid (HNO₃) and concentrated sulphuric acid (H₂SO₄), meaning hydrochloric acid is completely unused in this process.