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Question

Low visibility in cold weather is due to which of the following pollutant/s?

A
Sulfur oxides
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B
Nitrogen oxides
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C
Unburnt carbon particles
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D
All of the above
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Solution

The correct option is C Unburnt carbon particles
The combustion of fossil fuels increases the amount of suspended particles in the air. These suspended particles could be unburnt carbon particles or substances called hydrocarbons. The presence of high levels of all these pollutants lowers visibility, especially during cold weather when moisture condenses out of the air. This is known as smog and is a visible indication of air pollution.
So, the correct answer is option C.

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