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Question

Q84. Which of the following pollutants are considered for Ambient Air Quality Standards but not for National Air Quality Index?

1. Benzene 2. Arsenic

3. Nickel 4. Lead

Select the correct answer using the code given below.


A

(a) Only 1, 2 and 3

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B

(b) Only 2, 3 and 4

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C

(c) Only 1 and 4

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D

(d) All of the above

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Solution

The correct option is A

(a) Only 1, 2 and 3


Ambient air quality refers to the condition or quality of air surrounding us in the outdoors. National Ambient Air Quality Standards are the standards for ambient air quality set by the Central Pollution Control Board (CPCB) that is applicable nationwide.

The CPCB has been conferred this power by the Air (Prevention and Control of Pollution) Act, 1981. Pollutants: Sulphur Dioxide (SO2), Nitrogen Dioxide (NO2), PM10, PM2.5, Ozone, Lead, Carbon Monoxide, Ammonia, Benzene, Benzo (a) Pyrene (BaP)- particulate phase only, Arsenic, Nickel.

National Air Quality Index: It is released by The Central Pollution Control Board. It determines pollution of 8 pollutants: Particulate Matter (PM 2.5), Sulphur Dioxide (SO2), Nitrogen Dioxide(NO2), Carbon Monoxide (CO), Ozone(O3) Ammonia (NH3) and Lead (Pb).

The pollution is described with the help of Colour and into 6 categories: Good, Satisfactory, Moderately polluted, Poor, Very Poor and Severe. Thus Benzene, Benzo(a) Pyrene (BaP)- particulate phase only, Arsenic, Nickel are not considered for National Air Quality Index.


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