A. The measurement of air quality is based on six pollutants
B. It has six categories of air quality
C. The highest (worst) category of air quality is 'Very Poor'
D. It was developed by Central Pollution Control Board (CPCB) in consultation with IIT Kanpur
Choose the correct answer from the options given below :
National Air Quality Index (AQI) of India Analysis
The question asks to identify the correct statements about India's National Air Quality Index (AQI).
Statement Analysis
- Statement A: The measurement of air quality is based on six pollutants
This statement is incorrect. While the initial AQI framework launched in 2015 considered six pollutants, the current system monitors eight pollutants: PM2.5, PM10, SO2, NO2, CO, O3, NH3, and Pb. - Statement B: It has six categories of air quality
This statement is correct. The National AQI classifies air quality into six categories: Good, Satisfactory, Moderate, Poor, Very Poor, and Severe. - Statement C: The highest (worst) category of air quality is 'Very Poor'
This statement is incorrect. The highest or worst category in the AQI scale is 'Severe'. 'Very Poor' precedes 'Severe'. - Statement D: It was developed by Central Pollution Control Board (CPCB) in consultation with IIT Kanpur
This statement is correct. The National AQI was jointly developed by the Central Pollution Control Board (CPCB) and IIT Kanpur.
Correct Statements Identification
Based on the analysis, statements B and D are correct.
Conclusion
The option that includes only the correct statements (B and D) is the right answer.
Important Questions from Atmosphere
Which of the following statements with reference to Surface inversion of temperature is/are correct? 1. It causes instability in the lower layers of the atmosphere. 2. This inversion commonly lasts for a few hours until the Sun comes up.
Identify the cloud on the basis of the following characteristics: I. They look like cotton wool. II. They exist in patches and have flat base. III. They are generally formed at a height of 4 to 7 km.
Which of the following statements with reference to Surface inversion of temperature is/are correct?
1. It causes instability in the lower layers of the atmosphere.
2. This inversion commonly lasts for a few hours until the Sun comes up.Identify the cloud on the basis of the following characteristics:
I. They look like cotton wool.
II. They exist in patches and have flat base.
III. They are generally formed at a height of 4 to 7 km.Given below are two statements :
Statement (I): Atmospheric stability is important because it determines the ability of pollutants to disperse vertically in the atmosphere.
Statement (II): In summer season in India. the atmosphere is generally stable.
In the light of the above statements, choose the correct answer from the options given
