Multiple Choice Questions Photochemical smog consists of
A
SO2,CO2 hydrocarbons
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B
O3,SO2 hydrocarbons
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C
O3,PAN,NOX
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D
SO2,PAN, smoke
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Solution
The correct option is CO3,PAN,NOX Photochemical smog is caused by high levels of O3, NOx and PAN at high temperature and still air. It is induced by the action of sunlight or solar radiation over these pollutants.