Question

Q. National Air Quality Index includes which of the following gases?

Select the correct answer using the code given below:

• A.
  1, 2, 3, 4 and 5
• B.
  1, 2, 4 and 5 only
• C.
  2, 3 and 5 only
• D.
  1, 3 and 4 only

Answer 1

The correct option is B

1, 2, 4 and 5 only
Explanation:

The National Air Quality Index (AQI) disseminates information on air quality in a form that can be easily understood by the general public. The measurement of air quality is based on eight pollutants, namely,

• Particulate Matter (size less than 10 µm) or (PM10),
• Particulate Matter (size less than 2.5 µm) or (PM2.5),
• Nitrogen Dioxide $\left(N{O}_2\right)$,
• Sulphur Dioxide$\left(S{O}_2\right)$,
• Carbon Monoxide (CO),
• Ozone $\left(O_3\right)$,
• Ammonia $\left(N{H}_3\right)$, and
• Lead (Pb)