Pollution:
1. Any undesirable change in physical characteristics of air, land water and soil
2. Any undesirable change in biological characteristics of air, land water and soil
3. Any undesirable change in physical, chemical and biological characteristics of air, land water and soil
4. Any undesirable change in physical and chemical characteristics of air, land water and soil

Subtopic:  Introduction to Pollution & Types |
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Agents that bring undesirable change in biological, physical and chemical environment is called

(1) Pollutant

(2) Bioparcy

(3) Bioinformatics

(4) Biomagnification

Subtopic:  Introduction to Pollution & Types |
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The act to control environmental pollution is passed by Government of India is

(1) Environment Pollution Act-1981

(2) Environment Pollution Act-1986

(3) Environment Protection Act-1986

(4) Environment Protection Act-1981

Subtopic:  Introduction to Pollution & Types |
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Environment Protection Act protects and improves the quality of

(1) Air

(2) Water

(3) Soil

(4) All of these

Subtopic:  Introduction to Pollution & Types |
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Harmful effects of Air pollutants depend upon

(1) Organism exposed

(2) Duration of exposure

(3) Concentration of pollutants

(4) All of these

Subtopic:  Air Pollution |
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Smokestacks of thermal power plants, smelters and other industries release

(1) Particulate air pollutant

(2) Gaseous air pollutant

(3) Harmful gases

(4) All of these

Subtopic:  Air Pollution |
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The particulate matter in exhaust from industries can be removed by

(1) Electrostatic Precipitator

(2) Scrubber

(3) Both (1) and (2)

(4) Cannot be removed

Subtopic:  Air Pollution |
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Which of the following is not true about electrostatic precipator?

(1) It can remove over 99 per cent particulate matter present in the exhaust from a thermal power plant

(2) Electrode wires maintained at thousand volts, which produce a corona that release electrons

(3) The protons are attached to dust particle give them a net positive charge

(4) The collecting plates attract the dust particles

Subtopic:  Air Pollution |
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Scrubber

(1) Can remove only sulphur dioxide

(2) Can remove gases like sulphur dioxide

(3) Can remove harmless gases

(4) Mix harmless gases with gaseous pollutants

Subtopic:  Air Pollution |
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In scrubber, exhaust is passed through

(1) A spray of water/lime

(2) A spray of electrons

(3) A spray of other harmless gases

(4) All of these

Subtopic:  Air Pollution |
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