Question

Assertion (A): Sulphuric acid is known as the oil of vitriol.

Reason (R): Sulphuric acid was first obtained by heating crystals of green vitriol.

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:

Sulphuric acid is commonly known as oil of vitriol. Therefore, the Assertion (A) is true.

Historically, sulphuric acid was obtained by heating green vitriol (ferrous sulphate crystals), and the oily liquid obtained came to be called oil of vitriol. Therefore, the Reason (R) is true and correctly explains the Assertion.

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