Question

Which of the following is the key step in the manufacture of sulphuric acid?

Options

• Burning of sulphur or sulphide ores in air to generate SO₂

• Conversion of SO₂ to SO₃ by the reaction with oxygen in presence of catalyst.

• Absorption of SO₃ in H₂SO₄ to give oleum.

• Both (b) and (c)

Answer 1

Conversion of SO₂ to SO₃ by the reaction with oxygen in presence of catalyst.

Explanation:

The key step in the-manufacture of H₂​SO₄​ is catalytic oxidation of SO₂​ with O₂​ to give SO₃​ in presence of V₂​O₅​.