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Reducing smog is a mixture of :
 
Option: 1 Smoke, fog and CH_{2}=CH-CHO
Option: 2 Smoke, fog and O_{3}
Option: 3 Smoke, fog and N_{2}O_{3}  
Option: 4 Smoke, fog and SO_{2}

Answers (1)

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Reducing or classical smog is the combination of smoke, fog, and SO2 .

Therefore, the Correct option is (4).

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Kuldeep Maurya

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