Environmental Engineering in CE
The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant?

Alkyl benzene sulphonate (ABS)
Alkalis
Chlorine
Benzene hexachloride

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

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