MCQ on maharashtra board 8th science topic 8. Pollution

1 ) Pollutants are the factors that affect the natural functions of ecosystem.

A ) False

B ) True

Ans B ) True

2 ) The air pollutant that causes silicosis.

A ) Pesticides

B ) Dust

C ) Particulate matter

Ans B ) Dust

3 ) Find the odd one out

A ) Irritation of eyes

B ) Respiratory disorders

C ) Hepatitis

D ) Asthma

Ans C ) Hepatitis

4 ) Erosion of historical monuments: Acid rain :: Global warming: ……………

A ) Air pollution

B ) Green-house effect

Ans B ) Green-house effect

5 ) Many biotic and abiotic factors are added to water due to soil erosion.

A ) True

B ) False

Ans A ) True

6 ) Irritation of eyes : Air pollution :: Typhoid : ……………

A ) Water pollution

B ) Soil Pollution

Ans A ) Water pollution

7 ) Soil pollution occurs due to mixing of human wastes, birds and animal waste.

A ) True

B ) False

Ans A ) True

8 ) Hydrogen sulphide and sulphur dioxide gas emerge out through volcanic eruption.

A ) False

B ) True

Ans B ) True

9 ) The pollution that causes growth retardation in plants along with slowing down of rate of photosynthesis.

A ) Air pollution

B ) Water

C ) Soil

Ans A ) Air pollution

10 ) Bacteria: Biological pollutant :: Weedicides: ……………

A ) Organic pollutant

B ) Inorganic pollutant

Ans A ) Organic pollutant

11 ) Forest fire is considered to be natural cause for water pollution.

A ) True

B ) False

Ans B ) False

12 ) Methane: Air pollution :: Aquatic weeds: ……………

A ) Water pollution

B ) Soil pollution

Ans A ) Water pollution

13 ) Diseases spread through various pathogens.

A ) False

B ) True

Ans B ) True

14 ) Algal Growth : Water pollution: Leaching of toxic substances: ……………

A ) Air pollution

B ) Soil pollution

Ans B ) Soil pollution

15 ) The air pollutant that causes irritation of respiratory tract and lungs.

A ) CO2

B ) CO

C ) Oxides of nitrogen

Ans C ) Oxides of nitrogen

16 ) is a manmade reason for air pollution.

A ) Microbes in air

B ) Burning of solid waste

C ) Volcanic eruption

Ans B ) Burning of solid waste

17 ) Air is a homogeneous mixture of different gases.

A ) True

B ) False

Ans A ) True

18 ) The problem of water pollution increases due to pollution.

A ) Air

B ) Soil

Ans B ) Soil

19 ) Pollution occurs due to increasing population.

A ) True

B ) False

Ans A ) True

20 ) Find the odd one out

A ) Bleaching chemicals

B ) Burning of timber

C ) Disposal of floral offerings

D ) Thermal power plant

Ans B ) Burning of timber

21 ) Government body that that supervise and checks the pollution in industries.

A ) Maharashtra Pollution Control Board

B ) Pollution Control Board in Maharashtra

Ans A ) Maharashtra Pollution Control Board

22 ) pollution is caused by harmful substances like poisonous gases, smoke, particulate matter and

microbes.

A ) Water

B ) Air

C ) Soil

Ans B ) Air

23 ) Oil spillage is a natural reason for water pollution.

A ) False

B ) True

Ans A ) False

24 ) CO2 plays very important role of absorption of solar heat.

A ) True

B ) False

Ans A ) True

24 ) Contamination of natural environment that will be harmful to ecosystem is called as ……………

A ) Pollution

B ) Pollutant

Ans A ) Pollution

25 ) Icebergs and glaciers are melting due to acid rain.

A ) True

B ) False

Ans B ) False

26 ) makes the environment poisonous and unhealthy.

A ) Pollutants

B ) Biotic factors

C ) Abiotic factors

Ans A ) Pollutants

27 ) Ozone layer is present above the stratosphere.

A ) False

B ) True

Ans A ) False

28  )

Column-A

Column-B

i.

Water pollution and prevention act

a)

1981

ii.

Air pollution and prevention act

b)

1986

iii.

Environment protection act

c)

1974

A )

i.

Water pollution and prevention act

1974

ii.

Air pollution and prevention act

1986

iii.

Environment protection act

1981

i.

Water pollution and prevention act

1974

ii.

Air pollution and prevention act

1981

iii.

Environment protection act

1986

B )

Ans

i.

Water pollution and prevention act

1974

ii.

Air pollution and prevention act

1981

iii.

Environment protection act

1986

B )

29 ) is one of the factors causing pollution on the earth.

A ) Afforestation

B ) Industrialization

Ans B ) Industrialization

30 ) Out of the total land area of the soil, very large area of land is available for human use.

A ) False

B ) True

Ans A ) False

31 ) The compound that lowers the oxygen carrying capacity of the blood.

A ) CO2

B ) CO

C ) Carbon monoxide

Ans C ) Carbon monoxide

32 ) If wet waste is dumped at wrong place instead of composting, pathogens grow upon it.

A ) False

B ) True

Ans B ) True

33 ) river in Tamilnadu is referred to as Puzzar (Gutter river).

A ) Palar

B ) Kaveri

Ans A ) Palar

34 ) Find the odd one out

A ) Sulphur dioxide

B ) Carbon monoxide

C ) Methane

D ) Nematodes

Ans D ) Nematodes

35 ) Which of the following is NOT a cause of air pollution?

A ) Particulate matter

B ) Nitrous oxides

C ) Pollens

D ) Nematodes

Ans D ) Nematodes

36 ) The natural cause of air pollution is A ) Burning of fuels

B ) Industrialization

C ) Forest fires

D ) Atomic energy plants

Ans C ) Forest fires

37  )

Column-A

Column-B

i.

Air pollutant

a)

Endrin

ii.

Water pollutant

b)

Oxides of nitrogen

   

c)

Silicosis

A )

i.

Air pollutant

Silicosis

ii.

Water pollutant

Oxides of nitrogen

i.

Air pollutant

Silicosis

 

ii.

Water pollutant

Endrin

B )

Ans

i.

Air pollutant

Silicosis

ii.

Water pollutant

Endrin

B )

38 ) Ban over CFC is a preventive measure against water pollution.

A ) False

B ) True

Ans A ) False

39 ) pollutants are destroyed in the due course of time by nature’s rule.

A ) Natural

B ) Manmade

Ans A ) Natural

40 ) Complete the following table

 

Air Pollutants

Effects

i.

……………

Irritation of eyes

ii.

Dust

……………

iii.

……………

Skin cancer, Asthma

A )

 

Air Pollutants

Effects

i.

Sulphur dioxide

Irritation of eyes

ii.

Dust

Silicosis

iii.

Methane

Skin cancer, Asthma

 

Air Pollutants

Effects

i.

Carbon dioxide

Irritation of eyes

ii.

Dust

Respiratory diseases

iii.

Methane

Skin cancer, Asthma

B )

Ans

 

Air Pollutants

Effects

i.

Sulphur dioxide

Irritation of eyes

ii.

Dust

Silicosis

iii.

Methane

Skin cancer, Asthma

A )

41 ) Worst ever industrial accident that occurred in India during 1984.

A ) Bhopal gas accident

B ) Bihar gas accident

Ans A ) Bhopal gas accident

42 ) Earthquakes are considered as the natural reason for causing air pollution.

A ) True

B ) False

Ans A ) True

43 ) Global temperature is gradually increasing due to green-house effect.

A ) True

B ) False

Ans A ) True

44 ) Excessive growth of aquatic weeds results in.

A ) Faster decomposition of organic matter

B ) Depletion of oxygen levels

C ) Silicosis

D ) Increase in salt content of water

Ans B ) Depletion of oxygen levels

45 ) Acidity of the soil and water bodies increases due to acid rain.

A ) True

B ) False

Ans A ) True

46 ) There should be proper disposal of stinking waste generated in cities.

A ) True

B ) False

Ans A ) True

47 ) Nitrous oxide, methane and CFC are considered as green-house gases.

A ) True

B ) False

Ans A ) True

48 ) Heavy metals like mercury and cadmium are absorbed by plants and thus enter food chain.

A ) True

B ) False

Ans A ) True

49 ) Aliments of liver, kidneys are the effects on human beings due to pollution.

A ) Air

B ) Water

Ans B ) Water

50 ) Match the following

 

Column-A

 

Column-B

i.

Ozone hole

a)

Increase in Global temperature

ii.

Melting of polar ice

b)

Chlorofluorocarbons

   

c)

Add to greenhouse effect

A )

i.

Ozone hole

Chlorofluorocarbons

ii.

Melting of polar ice

Increase in global temperature

i.

Ozone hole

Add to greenhouse effect

ii.

Melting of polar ice

Increase in global temperature

B )

Ans

i.

Ozone hole

Chlorofluorocarbons

ii.

Melting of polar ice

Increase in global temperature

A )

51 ) Boards indicating the air quality index are displayed in busy squares in metro cities.

A ) True

B ) False

Ans A ) True

52 ) Ozone layer prevents the earth from ultraviolet rays of the Sun.

A ) False

B ) True

Ans B ) True

53 ) is a natural reason for air pollution.

A ) Forest fires

B ) Fuels

C ) Atomic energy plants

Ans A ) Forest fires

54 ) Many problems have arisen on the earth due to interference in the nature.

A ) Environmental

B ) Human

Ans B ) Human

55 ) Carbon dioxide gas is released from atomic energy plants.

A ) True

B ) False

Ans B ) False

56 ) Excessive algal growth pollutes …………….

A ) Soil

B ) Water

Ans B ) Water

57 ) Excessive use of chemical fertilizers can cause water pollution.

A ) False

B ) True

Ans B ) True

58 ) Find the odd one out.

A ) Industrialization

B ) Mining

C ) Forest fires

D ) Transportation

Ans C ) Forest fires

59 ) Arsenic : Inorganic pollutants :: Algae: ……………

A ) Inorganic pollutant

B ) Biological pollutant

Ans B ) Biological pollutant

60 ) Soil fertility gets affected due to water pollution.

A ) True

B ) False

Ans A ) True

61 ) Spores of bacteria and fungi are mixed with air causing air pollution.

A ) True

B ) False

Ans A ) True

62 ) Soil fertility decreases due to either natural or manmade reasons.

A ) True

B ) False

Ans A ) True

63 ) Diseases like hepatitis, typhoid are mainly caused due to pollution.

A ) Air

B ) Water

C ) Soil

Ans B ) Water

64 ) The city that was named as ‘Black City’ when smoke and soot caused night like situation.

A ) London

B ) Petersburg

C ) Ireland

Ans B ) Petersburg

65 ) Erosion of buildings and historical monuments occurs due to global warming.

A ) False

B ) True

Ans A ) False

66 ) Excessive algal bloom pollutes water.

A ) False

B ) True

Ans B ) True

67 ) Pollutants do not cause any harmful effects on biotic and abiotic factors.

A ) True

B ) False

Ans B ) False

68 ) Find the odd one out

A ) Algal bloom

B ) Acid rain

C ) Global warming

D ) Green-house effect

Ans A ) Algal bloom

69 ) Find the odd one out

A ) Retarded plant growth

B ) Leaching of toxic substances

C ) Adverse effects on sea birds

D ) Decreased dissolved oxygen level

Ans B ) Leaching of toxic substances

70 ) Deformities of bones and hypertension are the effects of water pollution on humans.

A ) True

B ) False

Ans A ) True

71 ) Due to acidification of water in water bodies and pipes, leaching of metal and plastic materials occur in water.

A ) False

B ) True

Ans B ) True

72 ) Find the odd one out.

A ) Kerosene

B ) Petrol

C ) LPG

D ) Biogas

Ans D ) Biogas

 

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