Question

In the laboratory preparation, HCl gas is dried by passing through ______.

Options

• Dilute nitric acid

• Concentrated sulphuric acid

• Dilute sulphuric acid

• Acidified water

Answer 1

In the laboratory preparation, HCl gas is dried by passing through concentrated sulphuric acid.

Explanation:

1. HCI gas is dried by passing it through concentrated H₂SO₄.
2. Due to its hydroscopic nature, concentrated sulphuric acid takes moisture from the air, dilutes, and works as a drying agent.