COD refers to
1.Chmical oxygen demand
2.Chemistry of diamonds
3.Catalysed oxidation of diamond
4.Catalysed oxidation of dussilved salts.
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Earth is protected from U.V. radiations by
1.Carbon dioxide layer
2.Oxygen layer
3.Ozone layer
4.Troposphere.
Posted Date:-2021-09-28 21:50:56
Green chemistry refers to
1.Chemistry of plants
2.Chemistry of green pigments
3.Development of chemical products and processes less harmful to humans
4.Chemistry of geen house effect.
Posted Date:-2021-09-28 21:50:56
Oxides os sulphur and nitrogen ae important pollutants of
1.Water
2.Air
3.Soil
4.All the above
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Spraying of DDT produces pollution of
1.Air
2.Air and water
3.Air and soil
4.Air water and soil.
Posted Date:-2021-09-28 21:50:56
Water pollution is mainly due to which of the following ?
1.Sulphur dioxide
2.Carbon dioxide
3.Oxygen
4.Industrial effluents
Posted Date:-2021-09-28 21:50:56
Which among the following is biodegradable pollutant?
1.Polythene
2.Asbestos
3.Sewage waste
4.Mercury
Posted Date:-2021-09-28 21:50:56
Which is most harmful for life on the globe ?
1.Deforestation
2.Soil erosion
3.Increasing deserts
4.Nuclear fallout.
Posted Date:-2021-09-28 21:50:56
Which is most harmful for life on the globe ? Increasing dese+A9rts
1.Deforestation
2.Soil erosion
3.Increasing dese+A9rts
4.Nuclear fallout.
Posted Date:-2021-09-28 21:50:56
Which of the following does not pertain to biosphere ?
1.Hydrosphere
2.Lithosphere
3.Thermosphere
4.Atmosphere
Posted Date:-2021-09-28 21:50:56
Which of the following does not pertain to biosphere ? .
1.Hydrosphere
2.Lithosphere
3.Thermosphere
4.Atmosphere
Posted Date:-2021-09-28 21:50:56
Which of the following is not a chemical pollutant ?
1.Solid waste
2.Noise
3.Insecticides
4.Liquid waste.
Posted Date:-2021-09-28 21:50:56
Which of the following substance is not present in acid rain ?
1.Sulphuric acid
2.Nitric acid
3.Sulphurous acid
4.Acetic acid
Posted Date:-2021-09-28 21:50:56
Which of the following substance is not present in acid rain ?
1.Sulphuric acid
2.Nitric acid
3.Sulphurous acid
4.Acetic acid
Posted Date:-2021-09-28 21:50:56