Question

The phenomenon of marble cancer is due to

• A. Soot particles
• B. CFCs
• C. Fog
• D. Acid rain

Answer 1

The correct option is D

Acid rain

The explanation for the correct option

(D) Acid rain

Acid rain

• When the pH of the rainwater drops below $5.6$, it is called acid rain.
• “Acid rain refers to the ways in which acid from the atmosphere is deposited on the earth’s surface.”
• Acid rain harms trees, crops, and plants by dissolving and washing away nutrients required for growth.
• Buildings and other structures composed of stone or metal are harmed by acid rain.

Marble cancer

• Pollutants in the air, such as sulphur dioxide and nitrogen dioxide, react with water vapour in the atmosphere to produce sulphuric acid and nitric acid, respectively.
• These acids react with rain, causing it to become acidic.
• Marble cancer is a phenomenon caused by acid rain corroding building materials like marble.

So, the phenomenon of marble cancer is due to acid rain.

The explanation for incorrect option

• Soot particles, CFCs, and fog do not directly cause marble cancer.
• Hence, options (A), (B), and (C) are incorrect.

Hence, option (D) is the correct option. The phenomenon of marble cancer is due to acid rain.