Question

In preparation of sulphuric acid from sulphur dioxide in lead chamber process. What substance is used as a catalyst?

Options

• Manganese dioxide

• Vanadium pentoxide

• Nitric oxide

• Raney nickel

Answer 1

Nitric oxide

Explanation:

In the preparation of sulphuric acid (H₂SO₄) by lead chamber process, mixture containing SO₂ air and NO is treated with steam (H₂O). In this reaction, NO acts as a catalyst.

\[\ce{2SO2 + \underset{(from air)}{O2} + 2H2O + \underset{Catalyst}{[NO]} -> 2H2SO4 + \underset{Catalyst}{[NO]}}\]