In an electrostatic precipitator,

(1) The velocity of air between the plates must be low enough to allow the dust to fall.

(2) The velocity of air between the plates must be very high to purify the air.

(3) There is no air between plates so that charge may not get disturbed

(4) None of these

Subtopic:  Air Pollution |
 68%
From NCERT
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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 |
 81%
From NCERT
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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 |
 82%
From NCERT
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CPCB stands for

(1) Control Pollution Central Board

(2) Central Population Control Board

(3) Central Pollution Control Board

(4) Control Population Central Board

Subtopic:  Air Pollution |
 73%
From NCERT
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The particulate matter cannot cause

(1) Breathing respiratory symptoms

(2) Irritation, premature death

(3) Inflammation and damage to the lungs

(4) Gastric ulcer and Rhinitis

Subtopic:  Air Pollution |
 90%
From NCERT
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In metro cities, which of the following is the major cause of atmospheric Pollution?

(1) Automobiles

(2) Population

(3) Industries

(4) All of these

Subtopic:  Air Pollution |
 55%
From NCERT
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To stop, automobile based environmental pollution, which of the following is not going to be a helpful measure?

(1) Proper maintenance of automobile

(2) Use of lead free petrol or diesel

(3) Catalytic Converters

(4) Scrubber

Subtopic:  Air Pollution |
 72%
From NCERT
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Which of the following is not a metal of catalytic converter?

(1) Platinum

(2) Palladium

(3) Rhodium

(4) Molybdenum

Subtopic:  Air Pollution |
 92%
From NCERT
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Catalytic converter does

(1) Unburnt Hydrocarbons are converted into carbon dioxide and water

(2) CO is converted into Carbon dioxide

(3) Nitric oxide is converted into Nitrogen gas

(4) All of these

Subtopic:  Air Pollution |
 93%
From NCERT
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If one is using Catalytic Converter in his vehicle then he should use

(1) Leaded petrol as it activates the catalyst

(2) Unleaded petrol activates the catalyst

(3) Leaded petrol as it inactivates the catalyst

(4) Unleaded petrol as lead inactivates the catalyst

Subtopic:  Air Pollution |
 65%
From NCERT
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