Question

The permissible limit of \(\mathrm{PM}_{10}\) in ambient air (24-hour average) as per Central Pollution Control Board (CPCB) standards in industrial areas is

• A. \(60\ \mu\text{g/m}^3\)
• B. \(100\ \mu\text{g/m}^3\)
• C. \(150\ \mu\text{g/m}^3\)
• D. \(200\ \mu\text{g/m}^3\)

Hint:

CPCB (24-hour average): \[ \boxed{ \mathrm{PM}_{10}=100\ \mu\text{g/m}^3,\qquad \mathrm{PM}_{2.5}=60\ \mu\text{g/m}^3. } \]

Answer 1

The Correct Option is B

Step 1: Recall the CPCB ambient air quality standards. According to the National Ambient Air Quality Standards (NAAQS) prescribed by the Central Pollution Control Board (CPCB), the permissible 24-hour average concentration of \(\mathrm{PM}_{10}\) in industrial, residential, rural, and other areas is \[ \boxed{100\ \mu\text{g/m}^3.} \]

Step 2: Choose the correct option. Hence, \[ \boxed{100\ \mu\text{g/m}^3} \] is the correct answer. Therefore, \[ \boxed{(B)} \] is the correct answer.