In the cities of our country, which among the following atmospheric gases are normally

2016

Environment, India Environmental Policy/Body

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)

1, 2 and 3 only

(b)

2, 3 and 4 only

(c)

1, 4 and 5 only

(d)

1, 2, 3, 4 and 5

Answer:

(b)

Explanation

National Air Quality Index: There are six AQI categories, namely Good, Satisfactory, Moderately polluted, Poor, Very Poor, and Severe. The AQI considers eight pollutants (PM10, PM2.5, NO2, SO2, CO, O3, NH3, and Pb ) for which short-term (up to 24-hourly averaging period) National Ambient Air Quality Standards are prescribed.Tikdam: CO2 is not a pollutant. everyone has to know this. It’s natural. It’s only a GHG. Eliminate 1 and you have the answer.