UPPCLE AE 2019
⭕ A. 20 μg/m³
⭕ B. 100 μg/m³
⭕ C. 180 μg/m³
⭕ D. 0.5 μg/m³
📚 Explanation:
According to the Central Pollution Control Board (CPCB), the annual concentration limit of ozone (O₃) in ecologically sensitive areas shall not exceed:
Ozone (O₃) is a secondary air pollutant formed by reactions between NOₓ and hydrocarbons in sunlight. High levels can damage vegetation, reduce crop yield, irritate respiratory tract, and impact ecosystem health.
According to the Central Pollution Control Board (CPCB), the annual concentration limit of ozone (O₃) in ecologically sensitive areas shall not exceed:
✔ 100 μg/m³ on two consecutive days of monitoring
Ozone (O₃) is a secondary air pollutant formed by reactions between NOₓ and hydrocarbons in sunlight. High levels can damage vegetation, reduce crop yield, irritate respiratory tract, and impact ecosystem health.
👉 Therefore, the correct answer is: B. 100 μg/m³
Key Points on Ozone (O₃) Standards:
- Ozone (O₃): Secondary pollutant formed by photochemical reactions.
- CPCB Annual Limit: 100 μg/m³ (ecologically sensitive areas).
- Monitoring Condition: Must not exceed limit for two consecutive days.
- Effects: Respiratory irritation, vegetation damage, reduced crop yield.
