Question

Sulphur in the first step of Contact process can be produced by ______.

विकल्प

• reactive metals

• metallic oxides

• metallic sulphides

• green vitriol

Answer 1

Sulphur in the first step of Contact process can be produced by metallic sulphides.

Explanation:

In the first step of the Contact process, sulphur dioxide gas (SO₂) is obtained either by burning elemental sulphur or by roasting metallic sulphides like iron pyrites (FeS₂).