The ultraviolet radiations in the stratosphere are absorbed by
O2
O3
SO2
Argon
Large no. of microbes and high level of water pollution indicated by
COD
DO
BOD
Non of these
Higher the BOD, lower would be
Both bank
Major source of methane in India is
Sugar canefields
Ricefields
Wheat fields
Fruit orchards
Wind blown acidic gases and particles settle down from the atmosphere on to the earth is called
Wet deposition
Dry deposition
Acid rain
smog
Most effective device to remove particulate pollutants
Use of ESP
Use of cyclonic separators
use of arresters
Use of filters
Which one of have low rate of air pollution
Compressed natural gas
NOx
Hydrocarbons
None of these
Absorption techniques are used to control
Petrochemicals
gaseous pollutants
toxic gases
oxidizable pollutants
Physical water pollutant
Viruses
Bacteria
Oil spills
Cd