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
In the cities of our country, which among the following atmospheric gases are normally considered in calculating the value of Air Quality Index?
1. Carbon dioxide
2. Carbon monoxide
3. Nitrogen dioxide
4. Sulfur dioxide
5. Methane
Select the correct answer using the code given below.
A layer in the Earth's atmosphere called Ionosphere facilitates radio communication. Why?
1) The presence of ozone causes the reflection of radio waves to Earth.
2) Radio waves have a very long wavelength.
Which of the statements given above is/are correct?
The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation?
1) There are no clouds or water vapour in the lower stratosphere.
2) There are no vertical winds in the lower stratosphere.
Which of the statements given above is/are correct in this context?
The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs
Which one of the following is associated with the issue of control and phasing out of the use of ozone-depleting substances?
