Rain water is :
Slightly acidic.
Strongly acidic.
Natural.
Slightly alkaline.
Which gas is evolved from the soil in flooded rice field and swamps
CH4
CO
NO2
SO2
Particulate air pollutants are
CO2
O2
Aerosol
The formation of ozone hole is maximum over ?
India
Africa
Europe
Antarctica
Witch of the following pair of gases cause green house effect ?
Oxygen & Hydrogen.
Carbon dioxide & Hydrogen.
CO2 & Chloro hydrocarbon.
Nitrogen & Sulfur dioxide.
Ozone, peroxy acetylnitrate and nitrogen oxides combine to form
Photochemical smog
Hydrocarbons
None of these
Green house effect is due to ?
CO.
CO2.
NH3.
PO4.
The amount of oxygen required for oxidation of the biodegradable and non-biodegradable present in water is called :
BOD
Both a and b.
COD
Which of the following is secondary pollutant?
Co
Co2
PAN
Combination of smoke and fog
Smog
NO
