Environmental Engineering in CE
Which of the following is not a natural source of air pollution?

Photochemical oxidation of organic matter
Biological decay of vegetable matter
None of these
Volcanic eruptions and lightening discharges

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Environmental Engineering in CE
Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for

Conversion of NOx into N₂ and NH₃ in the first compartment
All of these
Oxidation of unburnt hydrocarbon fuel in the second compartment
Conversion of CO into CO₂ in the second compartment

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