Q62. With reference to the National Air Quality Index, Consider the following statements
1. The AQI has four categories of air quality viz very Good, Moderately polluted, Poor, Very Poor.
2. AQI considers eight pollutants.
Select the correct answer using the codes given:

(a) Only 1

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(b) Only 2

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(d) None of the above

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Solution

The correct option is B (b) Only 2
The AQI has six categories of air quality, viz Good, Satisfactory, Moderately Polluted, Poor, Very Poor and Severe with distinct colour scheme. Each of these categories is associated with likely health impacts. AQI considers eights pollutants (PM10, PM2.5, NO2, SO2, CO, O3, NH3 and Pb) for which (up to 24-hourly averaging period) National Ambient Quality Standards are prescribed.

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