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Question

Which of the following is not regraded as a pollutant?


A

Nitrogen dioxide

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B

Carbon dioxide

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C

ozone (O3)

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D

Hydrocarbons

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Solution

The correct option is B

Carbon dioxide


Carbon dioxide is a natural constituent of the atmosphere and its vital to all forms of plant.Normally it forms 0.03% by volume of the atmosphere.If the the concentration of carbon dioxide slighly higher than 0.33%,it has an adverse effect on our climate.Thus ,in normal conditions carbondioxide is not regarded as pollutant.


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