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Smog

Smog is essen...

Question

Smog is essentially caused by the presence of:

A

Oxygen and ozone

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B

Ozone and sulphur

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C

Oxides of Sulphur and nitrogen

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D

Oxygen and nitrogen

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Solution

The correct option is D
Oxygen and nitrogen

Smog is caused when oxygen combines with nitrogen oxides from internal combustion engines or power plants in the presence of sunlight. Smog is fog or haze intensified by smoke or other atmospheric pollutants.

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