Pollution of Air and Water Test

Result

Pollution of Air and Water Test - 20

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Weekly Quiz Competition

Question 1
1 / -0

Potable water is the water which is

A
obtained from a river.

B
obtained from a lake.

C
pure and fit for drinking.

D
used only for washing clothes.

Solution

Potable water is water that is fit for consumption by humans and other animals. It is also called drinking water, in a reference to its intended use.
Question 2
1 / -0

Incomplete combustion of fuel such as petrol and diesel gives:

A
nitrogen oxide

B
sulphur dioxide

C
carbon monoxide

D
carbon dioxide

Solution

Incomplete combustion of fuels such as petrol and diesel gives carbon monoxide, which is a poisonous gas.
Question 3
1 / -0

Which of the following is not a way to conserve water?

A
Replace

B
Reduce

C
Reuse

D
Recycle

Solution

Replace is not a way to conserve water.
Following are the three ways to conserve water:
Reduce: Use only as much water as you need. Dont waste water.
Reuse: Water which is left after washing the vegetables and cloths should be used for mopping.
Recycle: Sewage and effluents should be treated before being flown into rivers or ponds.
Question 4
1 / -0

The sources of air pollutants are:

A
factories

B
power plants

C
automobile exhaust

D
All of the above

Solution

The substances which contaminate the air are called air pollutants. The sources of air pollutants are factories, power plants, automobile exhausts.
Question 5
1 / -0

Which among the following is a major cause of water pollution?

A
Fly ash

B
Aeroplane

C
Automobile exhaust

D
Pesticides

Solution

Pesticides when sprinkled on crops and plants also get mixed by water in the field and leads to water pollution.
Question 6
1 / -0

Water is often treated with chlorine to ________.

A
increase oxygen content

B
kill germs

C
remove suspended particles

D
remove hardness

Solution

Chlorine have anti-microbial property, hence it is used to kill germs in water.

Water chlorination is the process of adding chlorine or hypochlorite to water. This method is used to kill certain bacteria and other microbes in tap water. In particular, chlorination is used to prevent the spread of waterborne diseases such as cholera, dysentery, jaundice, typhoid etc.
Question 7
1 / -0

Air has________ composition with________ oxygen at high attitudes.

A
fixed, less

B
variable, less

C
variable, more

D
fixed, more

Solution

Air has fixed composition with less oxygen at high altitudes. Air contains 78% nitrogen and 21% oxygen and less than 1% He, Ar, Ne and water vapour content.

This composition remains fixed at all locations but the oxygen becomes less dense at high altitudes so it is difficult to breathe in such low concentration of air.

Hence, option A is correct.
Question 8
1 / -0

Incomplete combustion of petrol or diesel oil in automobile engines can be best detected by testing the fuel gases for the presence of __________.

A
carbon monoxide and water vapour

B
carbon monoxide

C
nitrogen dioxide

D
sulphur dioxide

Solution

The incomplete combustion of petrol and diesel in automobiles produces carbon monoxide. In fuel gases, the presence of carbon monoxide is tested for the confirmation of complete combustion.
Question 9
1 / -0

Greenhouse effect keeps the earth surface:

A
cold at night

B
dusty and cold

C
warm at night

D
none of these

Solution

Due to the greenhouse effect, the sunlight that the earth gets in the daytime is trapped inside the earth's atmosphere and at night the same energy keeps the earth's surface warm.
Question 10
1 / -0

Which of the following is one of the major factors that cause water pollution?

A
Burning of fossil fuels.

B
Dumping of industrial waste.

C
Use of CFC's.

D
None of these

Solution

Dumping of Industrial waste in rivers is one of the major factors that cause water pollution

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Re-Attempt Weekly Quiz Competition

Pollution of Air and Water Test - 20

Result

Pollution of Air and Water Test - 20

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SHARING IS CARING

Question 1

obtained from a river.

obtained from a lake.

pure and fit for drinking.

used only for washing clothes.

Solution

Question 2

nitrogen oxide

sulphur dioxide

carbon monoxide

carbon dioxide

Solution

Question 3

Replace

Reduce

Reuse

Recycle

Solution

Question 4

factories

power plants

automobile exhaust

All of the above

Solution

Question 5

Fly ash

Aeroplane

Automobile exhaust

Pesticides

Solution

Question 6

increase oxygen content

kill germs

remove suspended particles

remove hardness

Solution

Question 7

fixed, less

variable, less

variable, more

fixed, more

Solution

Question 8

carbon monoxide and water vapour

carbon monoxide

nitrogen dioxide

sulphur dioxide

Solution

Question 9

cold at night

dusty and cold

warm at night

none of these

Solution

Question 10

Burning of fossil fuels.

Dumping of industrial waste.

Use of CFC's.

None of these

Solution

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