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Photochemical Smog

The photochem...

Question

The photochemical smog is formed by.

A

Nitrogen oxides

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B

Hydrocarbons

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C

Nitrogen oxides and hydrocarbons

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D

Solar radiations upon nitrogen oxides and hydrocarbons

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Solution

The correct option is D Solar radiations upon nitrogen oxides and hydrocarbons
Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities. It tends to occur more often in summer, because of most sunlight.
So, the correct option is 'Solar radiations upon nitrogen oxides and hydrocarbons'.

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Similar questions

Q. Assertion : Photochemical smog is produced by nitrogen oxides
Reason: Vehicular polIution is a major source of nitrogen oxides.

Q. Read the following statements regarding the PAN (peroxyacyl nitrates) and select the correct ones.
(i) It is a secondary pollutant present in photochemical smog.
(ii) It is produced by photochemical reactions between hydrocarbons and nitrogen oxides in the presence of sunlight of UV radiations.
(iii) It is thermally unstable and decomposes into peroxyethanoyl radicals and nitrogen dioxide gas.
(iv) It is a lachrymatory substance, causing irritation of eyes.

Q. Photochemical reaction of nitrogen oxides with unsaturated hydrocarbons produces.

Q. Assertion :Photochemical smog is mainly composed of nitrogen oxides, volatile organic compounds, ozone and peroxyacyl nitrates. Reason: Photochemical smog develops in cold weather conditions by the interaction of secondary pollutants.

Q. Photochemical oxidants such as PAN and PBN are formed :
A. by the action of nitrogen oxides on hydrocarbons in the presence of sunlight.
B. by the action of carbon dioxide on hydrocarbons in the presence of sunlight.
C. by the action of hydrogen sulphide on hydrocarbons in the presence of sunlight.

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Photochemical Smog

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