Lead begins show toxic beyond 20 microg/100ml in blood, Reverse osmosis is treatment stage of waste water Tertiary

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Free Online Mock Biology Multiple Choice Test on Environment Pollution

Sub Category : Environment Pollution	Test : 3	Time Left :
1.Who believes that SO2 pollution is related to higher death rate in aged persons?
(1) Brehm (2) Hicky (3) Moore (4) Roy and Le Blank.
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2.Lead begins to show toxic effect beyond ..... in blood.
(1) 18 microg/100ml (2) 20 microg/100ml (3) 12 microg/100ml (4) 28 microg/100ml.
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3.Deterioration of rubber products is due to pollutant
(1) Hydrogen sulophne (2) Smog (3) SO2 (4) NO2.
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4.Which of the following shows biological amplification??
(1) Hg (2) Cd (3) Both (4) None.
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5.Reverse osmosis is done in ..... treatment stage of waste water.?
(1) Primary (2) Secondary (3) Tertiary (4) Quaternary.

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Free Online Mock Biology Multiple Choice Test on Environment Pollution