Environmental Engineering in CE
Biological oxidation ponds remove organic matters present in the polluted water by

Aerobic oxidation
Neither A nor B
Using the activities of bacteria and other micro organisms
Both A & B

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

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

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