Question

Ozone is an allotropic form of oxygen. It acts as a powerful oxidising agent.

Which one of the following compounds is formed when ozone reacts with black lead sulphide?

Options

• Blue coloured lead trioxide

• White coloured lead sulphate

• Green coloured lead oxide

• Red coloured tri lead tetroxide

Answer 1

White coloured lead sulphate

Explanation:

Ozone has a bent structure due to sp² hybridisation and the presence of a lone pair on the central oxygen atom. It is a strong oxidising agent and oxidises black lead sulphide (PbS) to white lead sulphate (PbSO₄):

\[\ce{PbS + 4O3 -> PbSO4 + 4O2}\]