Question

Assertion (A): Ammonia is dried by passing through a drying tower containing CaO.

Reason (R): Ammonia being basic in nature reacts with other drying agents.

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

(1)

Explanation:

Ammonia is dried by passing it through a drying tower containing quicklime (CaO) because CaO absorbs moisture without reacting with ammonia. Therefore, the Assertion (A) is true.

Ammonia is basic in nature and reacts with acidic drying agents such as concentrated sulphuric acid. Other common drying agents like anhydrous calcium chloride can also absorb ammonia. Therefore, the Reason (R) is true and correctly explains why CaO is used.

Hence, both A and R are true, and R is the correct explanation of A.