Tag: air pollution - effects and control

Questions Related to air pollution - effects and control

Match column I with column II and select the correct option from the given codes.

Column I Column II
A. Electrostatic precipitator (i) Removes gases like $SO _2$
B. Scrubber (ii) Reduces automobile emission
C. Catalytic converter (iii) Removes particulate matter
zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

  1. A - (ii), B - (iii), C - (i)

  2. A - (iii), B - (ii), C - (i)

  3. A - (i), B - (ii), C - (iii)

  4. A - (iii), B - (i), C - (ii)

Show answer
Correct Option: D
Explanation:
 Column I  Column II
 Electrostatic precipitator  Removes particulate matter
 Scrubber   Removes gases like SO$ _2$
 Catalytic converter  Reduces automobile emmission.

Read the following statements carefully.
(i) An electrostatic precipitator removes particulate matter by imposing negative charge on them.
(ii) Catalytic converters convert unburnt hydrocarbons into $ { CO } _{ 2 } $ and water.
(iii) Peroxyacyl nitrates (PAN) is a secondary pollutant.
(iv) DDT is a non-biodegradable pollutant.

Which of the above statements are incorrect ?

zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

  1. (i) and (ii)

  2. (iii) and (iv)

  3. (i) and (iii)

  4. None of these

Show answer
Correct Option: D
Explanation:
An electrostatic precipitator removes particulate matter by imposing a negative charge on them. Then they are separated electrostatically.
Catalytic converters convert unburnt hydrocarbons into CO2CO2 and water. They are used in automobiles.
Peroxyacyl nitrates (PANs) is a secondary pollutant formed by reaction of oxides of nitrogen and unsaturated hydrocarbons.
DDT is a non-biodegradable pollutant.
All the given statements in the question are correct,
So, the correct option is 'None of these'.

Match column I with column II and select the correct option from the given codes.

Column I Column II
A Catalytic converter (i) Used in industries and power plants
B Electrostatic precipitator (ii) Used in automobiles
C Earmuffs (iii) High noise level
D Land fills (iv) Solid wastes
zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

  1. A-(i), B-(ii), C-(iii), D-(iv)

  2. A-(II), B-(i), C-(iii), D-(iv)

  3. A-(iv), B-(III), C-(ii), D-(i)

  4. A-(iii), B-(ii), C-(iv), D-(i)

Show answer
Correct Option: B
Explanation:
Catalytic converters are used in automobiles to reduce the harmful gases from the emission.
Electrostatic precipitators are used in industries and power plants to remove the harmful gases from their emission.
Earmuffs are used in cases of high noise level to protect the eardrum and the ear from the noise pollution.
Landfills are the places where the solid waste is dumped.
So, the correct option is 'A-(II), B-(i), C-(iii), D-(iv)'


A pollution control device which can remove gases like $SO _2$ are known as

zoology environmental issues air pollution and its control air pollution - effects and control not for breathing not for drinking

  1. Electrostatic precipitator

  2. Scrubber

  3. Chimneys

  4. Both A and B

Show answer
Correct Option: B
Explanation:
  • A pollution control device which can remove gases like SO$ _2$ is known as a scrubber. It removes most of the sulfur oxides from the smokestack exhaust of a power plant when sulfur dioxide enters a scrubber.
  •  In the scrubber, there is a water spray that produces a cloud of fine water droplets. The water is mixed with crushed limestone, which reacts with the sulfur and pulls it out of the exhaust.

So, the correct answer is 'Scrubber'.

Air pollution management for particulate matter is carried out by devices such as arresters. The device which is not an example of arrester is:

zoology environmental issues air pollution and its control air pollution - effects and control not for breathing not for drinking

  1. Cyclonic seperator

  2. Scrubber seperator

  3. Gravity settling chamber

  4. Teflon porous bags or filters

Show answer
Correct Option: B
Explanation:

Scrubber separator is a type of dust separator device and not particulate matter separator.

So, the correct answer is 'scrubber separator'

Air pollution from automobiles can be controlled by fitting

zoology environmental issues air pollution and its control air pollution - effects and control not for breathing not for drinking

  1. Cyclone separator

  2. Electrostatic precipitator

  3. Catalytic converter

  4. Wet scrubber

Show answer
Correct Option: C
Explanation:

A catalytic converter is an emissions control device that converts toxic pollutants in exhaust gas to less toxic pollutants by catalyzing a redox reaction 

Which of the following reduce(s) air pollution?
(i) Using an incinerator
(ii) Using renewable energy
(iii) Fixing catalytic converters in vehicles

zoology environmental issues air pollution and its control air pollution - effects and control not for breathing not for drinking

  1. Only (i)

  2. (ii) and (iii)

  3. (i) and (iii)

  4. (i), (ii) and (iii)

Show answer
Correct Option: B
Explanation:

Incinerators are used to burn garbage which produces toxic ash, nitrogen oxides, carbon dioxides etc and thus, contributes to the air pollution. This method is mainly used to reduce solid wastes. Using renewable energy like solar and wind energy are the natural energy source that does not contribute to the air pollution. Catalytic converters reduce air pollution as it converts the harmful gas into the useful like it converts the carbon monoxide into the carbon dioxide which then absorbed by the plants. Thus, the correct answer is option B.

Cyclone collectors and electrostatic precipitators are meant for controlling.

zoology environmental issues air pollution and its control air pollution - effects and control not for breathing not for drinking

  1. Sewage pollution

  2. Air pollution

  3. Pesticide pollution

  4. Natural pollution

Show answer
Correct Option: B
Explanation:

A cyclonic separation is a method of removing particulates from an air stream, without the use of filters, through vortex separation. 

An electrostatic precipitator is a device that removes suspended dust particles from a gas or exhaust by applying a high-voltage electrostatic charge and collecting the particles on charged plates.
Both are instruments in controlling air pollution in industries.
So, the correct option 'Air pollution'.

Bag filters are used for removal of pollutants from

zoology environmental issues air pollution and its control air pollution - effects and control not for breathing not for drinking

  1. Exhaust emissions

  2. Effluent water

  3. Sewage water

  4. Both B and C

Show answer
Correct Option: A
Explanation:
A. Exhaust emissions are the substances or gases that are released on burning of fuels.
B. Effluent water is the wastewater which is released in water bodies after treatment in sewage treatment plant so that harmful contaminants get removed from it.
C. Sewage water is the wastewater which is produced by a community of people.
Bag filters are the equipments used to control air pollution. They control the level of exhaust emissions such as sulphur dioxide and other gases.
So, the correct answer is 'Exhaust emissions'.

All except one mentioned below is an incorrectly mentioned rule framed under Environment (Protection) act, 1986. Identify it.

zoology not for breathing not for drinking air pollution and its control air pollution - effects and control environmental issues

  1. Ozone Depleting Substanes Rules, 2000

  2. Harzardous Wastes Rules, 1989

  3. Air Prevention and Control of Pollution Act, 1981

  4. Biomedical Wastes Rules, 1998

Show answer
Correct Option: C
Explanation:

Air Prevention and Control of Pollution Act, 1981 is an Act of the Parliament of India to control and prevent air pollution in India. It is different from the Environment (Protection) act, 1986 and not a part of it.