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Botany MCQs for NEET — Practice Questions with Answers

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Harmful effects of Air pollutants depend upon

A. Organism exposed B. Duration of exposure C. Concentration of pollutants D. All of these

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Explanation

Page number 271

16.1 Air Pollution And It's Control

Environmental Issues

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Smokestacks of thermal power plants, smelters and other industries release

A. Particulate air pollutant B. Gaseous air pollutant C. Harmful gases D. All of these

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Explanation

Page number 271

16.1 Air Pollution And It's Control

Environmental Issues

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The particulate matter in exhaust from industries can be removed by

A. Electrostatic Precipitator B. Scrubber C. Both of these D. Cannot be removed

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Explanation

Page number 271

16.1 Air Pollution And It's Control

Environmental Issues

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Which of the following is not true about electrostatic precipator?

A. It can remove over 99 per cent particulate matter present in the exhaust from a thermal power plant B. Electrode wires maintained at thousand volts, which produce a corona that release electrons C. The protons are attached to dust particle give them a net positive charge D. The collecting plates attract the dust particles

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Explanation

Page number 271

16.1 Air Pollution And It's Control

Environmental Issues

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To stop, automobile based environmental pollution, which of the following is not going to be a helpful measure?

A. Proper maintenance of automobile B. Use of lead free petrol or diesel C. Catalytic Converters D. Scrubber

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Explanation

Page number 272

16.1 Air Pollution And It's Control

Environmental Issues

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Which of the following is not a metal of catalytic converter?

A. Platinum B. Palladium C. Rhodium D. Molybdenum

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Explanation

Page number 272

16.1 Air Pollution And It's Control

Environmental Issues

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Catalytic converter does

A. Unburnt Hydrocarbons are converted into carbon dioxide and water B. CO is converted into Carbon dioxide C. Nitric acid is converted into Nitrogen G gas D. All of these

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Explanation

Page number 272

16.1 Air Pollution And It's Control

Environmental Issues

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If one is using Catalytic Converter in his vehicle then he should use

A. Leaded petrol as it activates the catalyst B. Unleaded petrol activates the catalyst C. Leaded petrol as it inactivates the catalyst D. Unleaded petrol as lead inactivates the catalyst

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Explanation

Page number 272

16.1 Air Pollution And It's Control

Environmental Issues

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Biochemical oxygen demand is

A. Directly proportional to Biodegradable organic matter B. Inversely proportional to Biodegradable organic matter C. Depends on direction of flow D. Directly proportional to dissolved oxygen

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Explanation

Page number 275

16.2 Water Pollution and It's control

16.2.1 Domestic Sewage and Industrial Effluents

Environmental Issues

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Higher the biodegradable organic matter in sewage

A. Higher the dissolved oxygen B. Higher the BOD C. Lower the number of Bacteria D. All of these

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Explanation

Page number 275

16.2 Water Pollution and It's control

16.2.1 Domestic Sewage and Industrial Effluents

Environmental Issues

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