Smog is common pollutant in place having low temperature, Green house effect is due to presence of CO2 layer in atmosphere

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Free Online Mock Biology Multiple Choice Test on Organism and Environment

Sub Category : Organism and Environment	Test : 10	Time Left :
1.Biological treatment of water pollution is done with the help of
(1) Phytoplanktons (2) Fungi (3) Lichens (4) None of these
1 2 3 4
2.Smog is common pollutant in a place having
(1) High temperature (2) Low temperature (3) Excessive CO2 in air (4) Excessive SO2 in air
1 2 3 4
3.Green house effect is due to presence of
(1) Ozone layer in atmosphere (2) Infrared light reaching the earth (3) Moisture layer in almosphere (4) CO2 layer in atmosphere
1 2 3 4
4.Terracing is effective method of soil conversation in?
(1) Desert area (2) Plain area (3) Hill area (4) None of the above
1 2 3 4
5.Sewage water can be purified for recycling with the action of?
(1) Aquatic plants (2) Fishes (3) Chlorine (4) Micro-organisms

1 2 3 4
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Free Online Mock Biology Multiple Choice Test on Organism and Environment