Question

Assertion (A): Liquid ammonia is used as a refrigerant in ice plants.

Reason (R): CFC, the main refrigerant, causes global warming.

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

(2)

Explanation:

Liquid ammonia is used as a refrigerant in ice plants because it readily absorbs heat when it evaporates and can be easily liquefied again under pressure. Therefore, the Assertion (A) is true.

CFCs are refrigerants that contribute to global warming and also damage the ozone layer. Therefore, the Reason (R) is true.

However, the Reason does not correctly explain why liquid ammonia is used as a refrigerant in ice plants.

Hence, both A and R are true, but R is not the correct explanation of A.