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Question

What is the reason for irritant red haze in traffic and congested places?

A
Oxides of phosphorus
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B
Oxides of carbon
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C
Oxides of nitrogen
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D
Oxides of sulphur
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Solution

The correct option is C Oxides of nitrogen
The irritant red haze in traffic and congested places is due to the oxides of Nitrogen.
Nitrogen dioxide has a deep red color ,and is a poisonous gas. When it is mixed with aerosols, it causes reddish brown colour of haze in congested places.The fuel release of cars and trucks are the major sources of Nitrogen oxides. Mostly NO is present in automobile exhaust, and ​once this NO is released in the atmosphere it combines with Oxygen of the air to form by the following chemical reaction.
2NO+O22NO2

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