Direct reaction of unsaturated hydrocarbons with either NO or NO2 produces an eye irritating pollutant compound known as
A. Photochemical smog
B. Peroxy acetyl nitrate (PAN) or methyl nitrile
C. Benzopyrene
D. Poly acrylonitrile
Answer: Option B
A. Photochemical smog
B. Peroxy acetyl nitrate (PAN) or methyl nitrile
C. Benzopyrene
D. Poly acrylonitrile
Answer: Option B
Fluorosis is caused due to the presence of excessive amount of __________ in drinking water.
A. Mercury
B. Lead
C. Fluoride
D. Arsenic
Smog is not formed due to the presence of __________ in the atmosphere.
A. SO2
B. NOx
C. CO2
D. Any of these
Dose of chlorine for disinfection of water is about __________ mg/litre of water.
A. 0.01
B. 0.1
C. 0.3
D. 1
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