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CHEMISTRY

Chemistry
Which of the following is not a gaseous air pollutant?

Smoke
Oxides of nitrogen
Hydrocarbon
Oxides of sulphur

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Chemistry
Which of the following is ozone depleting pesticide ?

Benzene
Methyl bromide
D.T.
Ethylene ozonide

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Chemistry
Threshold limit value of copper in the atmospheric air is

0.01 mg/m3
1.0 mg/m3
5.0 mg/m3
0.001 mg/m3

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Chemistry
Removal of carbon particles from air involves the principle of

Filteration
Electrophoresis
Precipitation
Sedimentation

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Chemistry
Physico-chemical characteristics of water in water sources undergo changes due to

Aquatic macrophytes
Auatic fungi
Effluents
Evapotranspiration

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