Question

Assertion (A): Chloride can be tested by adding concentrated sulphuric acid to it. A colourless gas with a pungent odour is evolved.

Reason (R): The gas formed is chlorine.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Options

• (1)

• (2)

• (3)

• (4)

Answer 1

(3)

Explanation:

When a chloride salt is treated with concentrated sulphuric acid, it evolves a colourless gas with a pungent odour. The gas is hydrogen chloride (HCl). Therefore, the Assertion (A) is true.

The gas formed is not chlorine; chlorine is a greenish-yellow gas. Therefore, the Reason (R) is false.

\[\ce{NaCl + H2SO4(conc{.}) -> NaHSO4 + HCl ^}\]

Hence, A is true but R is false.