Question

Discolouration and physical deterioration of buildings and sculptures is due to ............ pollutant in air.

• A. Sulphur dioxide
• B. Chlorofluorocarbon
• C. Carbon dioxide
• D. Carbon monoxide

Hint:

Sulphur dioxide is the primary pollutant responsible for acid rain, which leads to the degradation of various structures, including buildings and sculptures.

Answer 1

The Correct Option is A

Step 1: Understanding the question.
Sulphur dioxide (SO2) is a major air pollutant that contributes to the discolouration and deterioration of buildings and sculptures. It reacts with water in the air to form sulfuric acid, which then corrodes stone and metal surfaces.
Step 2: Analyzing the options.
(A) Sulphur dioxide: Correct — Sulphur dioxide is a major cause of air pollution and acid rain, which leads to the degradation of buildings and sculptures.
(B) Chlorofluorocarbon: While chlorofluorocarbons are harmful to the ozone layer, they do not directly cause physical deterioration of buildings and sculptures.
(C) Carbon dioxide: Carbon dioxide is a greenhouse gas and does not contribute significantly to the physical deterioration of buildings and sculptures.
(D) Carbon monoxide: Carbon monoxide is toxic to humans but does not cause discolouration or deterioration of buildings and sculptures.
Step 3: Conclusion.
The correct answer is (A) Sulphur dioxide, as it is the pollutant responsible for the discolouration and physical deterioration of buildings and sculptures.