Consider the following statements about Particulate Matter (PM):

Question

Consider the following statements about Particulate Matter (PM):

(i) Mixture of solid particles and liquid droplets found in the air.

(ii) Dust from construction sites and unpaved roads is a major source of PM in the air.

(iii) Over exposure to PM can lead to respiratory disorders.

Which of the above statements are correct?

1. A. (i) and (ii) only
2. B. (i) and (iii) only
3. C. (ii) and (iii) only
4. D. (i), (ii) and (iii) (Correct answer)

Correct Answer

Option D — (i), (ii) and (iii)

Detailed Solution & Explanation

The correct answer is (i), (ii) and (iii).

Key Points

• All three statements about Particulate Matter (PM) are correct.
• PM is a mixture of solid particles and liquid droplets.
• Construction sites and unpaved roads are major sources of PM2.5 and PM10.
• Prolonged exposure causes respiratory and cardiovascular disorders — a major air quality concern.