Question

Assertion: Copper obtained after bessemerisation is known as blister-copper.

Reason: Blisters are produced on the surface of the metal due to escaping of sulphur dioxide gas during cooling.

Options

• If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.

• If both Assertion and Reason are CORRECT but Reason is not the CORRECT explanation of the Assertion.

• If Assertion is CORRECT but Reason is INCORRECT.

• If Assertion is INCORRECT but Reason is CORRECT.

Answer 1

If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.

Explanation:

After Bessemerisation, the copper obtained is called blister copper (about 98–99% pure). During cooling, sulphur dioxide (SO₂) gas escapes from the molten metal, producing blisters on its surface. Hence, the copper is known as blister copper, and the reason correctly explains the assertion.