Question

The pollution due to oxides of sulphur gets enhanced due to the presence of:

1. Particulate matter
2. Ozone
3. Hydrocarbons
4. Hydrogen peroxide.

Choose the most appropriate answer from the options given below:

• A. (a), (d) only
• B. (a), (b), (d) only
• C. (b), (c), (d) only
• D. (a), (c), (d) only

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Oxides of sulphur (specifically \(SO_{2}\)) contribute to atmospheric pollution. Their harmful effects are increased when they are oxidized to sulphur trioxide (\(SO_{3}\)), which then forms acid rain.
Detailed Explanation:
The oxidation of \(SO_{2}\) to \(SO_{3}\) is enhanced by several catalysts and oxidants present in the atmosphere:
(a) Particulate matter: Dust and soot particles act as catalysts for the oxidation process.
(b) Ozone (\(O_{3}\)): It directly oxidizes \(SO_{2}\) to \(SO_{3}\).
(d) Hydrogen peroxide (\(H_{2}O_{2}\)): It is a strong oxidant that reacts with \(SO_{2}\) in cloud droplets.
Hydrocarbons do not directly enhance the oxidation of sulphur oxides in this specific pathway.
Step 2: Final Answer:
The presence of (a), (b), and (d) enhances sulphur oxide pollution. Option (2) is correct.