Air Pollution Test

Question 1
1 / -0

Which of the following statements is true for potable water?

A
Water that can be used for bathing and washing and not fit for drinking

B
Water safe for drinking purpose

C
Water that can be easily accessible

D
Water that can easily be transported from one place to another

Question 2

1 / -0

Study the dichotomous key and identify the events X, Y and Z.

I. (i) A form of normal precipitation
(ii) Precipitation is not normal Go to II
II. (i) An extended period of water shortage
(ii) An overflow of water submerging land

	X	Y	Z
(1)	Flood	Drought	Rain
(2)	Rain	Flood	Drought
(3)	Rain	Drought	Flood
(4)	Drought	Rain	Flood

(1)

(2)

(3)

(4)

Question 3
1 / -0

What is meant by the term contamination?

A
The concentration of a toxic substance is above natural levels.

B
The concentration of a toxic substance is not above natural levels.

C
The presence of any undesirable substance that lowers the quality of water even if it is not harmful to humans.

D
The presence of any undesirable substance that lowers the quality of water and is harmful to humans.

Question 4
1 / -0

Which of the following are non-point sources of water pollution?

A
Factories

B
Sewage treatment plants

C
Urban and suburban lands

D
All of the above

Question 5
1 / -0

BOD is ______ in polluted water and ______ in potable water.

A
more, less

B
less, medium

C
medium, more

D
less, more

Question 6
1 / -0

The underground water is mainly polluted due to

A
leaky sewers

B
poorly constructed and abandoned wells

C
poorly constructed and abandoned septic tanks

D
All of the above

Question 7
1 / -0

Fish die in water polluted by sewage due to

A
pathogens

B
reduction in O₂

C
clogging of gills by silt

D
foul smell

Question 8
1 / -0

Liquid waste that is discharged from the industries is referred to as industrial ___________.

A
effluent

B
sewage

C
sludge

D
slurry

Question 9
1 / -0

Which of the following factors causes the removal of oxygen from the water, consequently killing aquatic plants and animals?

A
Lead dust from the exhaust fumes of vehicles

B
Chemical fertilisers, insecticides and pesticides, washed off from surrounding lands

C
Human and livestock wastes

D
None of these

Question 10

1 / -0

Study the given flowchart regarding the causes of water pollution and select the suitable examples of W, X, Y, U and V:

	W	X	Y	U	V
(1)	Oil spills	Pesticides	Detergents	Bacteria	Viruses
(2)	Soaps	Detergents	Bacteria	Oil spills	Viruses
(3)	Soaps	Pesticides	Viruses	Bacteria	Oil spills
(4)	Soaps	Pesticides	Oil spills	Detergents	Viruses

(1)

(2)

(3)

(4)

Question 11

1 / -0

Observe the table given below and identify the components of the air represented by W, X, Y and Z.

	W	X	Y	Z
(1)	CO₂	N₂	CO₂	O₂
(2)	CO₂	CO₂	N₂	O₂
(3)	N₂	O₂	CO₂	CO₂
(4)	CO₂	N₂	O₂	CO₂

(1)

(2)

(3)

(4)

Question 12
1 / -0

Which of the following processes does not remove oxygen from the atmosphere?

A
Respiration

B
Burning of fuels

C
Dissolution in water bodies

D
Volcanic eruptions

Question 13

1 / -0

Select the option that correctly fills the blanks in the given statements.

I. Air supports combustion because of the presence of __(i)__ gas in it.
II. The most abundant gas in the air is __(ii)__.
III. __(iii)__ and __(iv)__ keep the Earth warm even after sunset because they absorb some of the heat radiated by the Earth.
IV. __(v)__ is the most abundant noble gas in the air.

	(i)	(ii)	(iii)	(iv)	(v)
(1)	oxygen	water vapour	Carbon dioxide	methane	Xenon
(2)	ozone	nitrogen	Carbon monoxide	methane	Helium
(3)	oxygen	nitrogen	Carbon dioxide	Nitrogen dioxide	Neon
(4)	oxygen	nitrogen	Carbon dioxide	methane	Argon

(1)

(2)

(3)

(4)

Question 14
1 / -0

It is lowest layer of the Earth's atmosphere; the temperature gets colder as the distance above the earth increases. This is also where most of the weather phenomena occur.

Which layer of the atmosphere is being discussed here?

A
Troposphere

B
Stratosphere

C
Mesosphere

D
Thermosphere

Question 15
1 / -0
Consider the clues given below and identify the layer of the atmosphere that is being discussed.
- Ozone is abundant in this layer.
- Ozone heats this layer as it absorbs energy from incoming ultraviolet radiation from the sun.
A
Thermosphere

B
Troposphere

C
Mesosphere

D
Stratosphere

Question 16
1 / -0

Which pollutant(s) come(s) from mobile sources?

A
Hydrocarbons

B
Nitrogen oxides

C
Carbon dioxide

D
All of the above

Question 17
1 / -0

Which of the following activities can help reduce the amounts of dangerous substances in the air?

A
Greater use of public transportation

B
Greater use of private cars

C
Use of leaded gasoline

D
Use of CNG

Question 18
1 / -0

Analyse the two statements given below and select the correct option.

Statement I: Carbon monoxide produced during incomplete combustion of fuels such as petrol and diesel is a poisonous gas.
Statement II: Carbon monoxide reduces the oxygen carrying capacity of the blood.

A
Both statements I and II are correct and statement II is the correct reason for I.

B
Both statements I and II are correct, but statement II is not the correct reason for I.

C
Statement I is correct, but statement II is incorrect.

D
Both statements I and II are incorrect.

Question 19

1 / -0

Study the dichotomous key and identify W, X, Y and Z.

I. (i) Produced only during partial combustion of fossil fuels
(ii) Produced even during complete combustion of fossil fuels Go to II
II. (i) It is a reddish-brown gas.
(ii) It is a colourless gas. Go to III
III. (i) It is a pungent smelling gas.
(ii) It is a pollutant only if present in excess amount.

	W	X	Y	Z
(1)	NO₂	SO₂	CO₂	CO
(2)	CO	NO₂	SO₂	CO₂
(3)	SO₂	NO₂	CO₂	CO
(4)	CO₂	CO	NO₂	SO₂

(1)

(2)

(3)

(4)

Question 20
1 / -0

Which of the following statements about photochemical smog are correct?

I. Photochemical smog is caused during summers.
II. It is caused by the release of hydrocarbons due to the incomplete combustion of fuels.
III. It may cause problems in the respiratory tract.

A
I and III

B
I and II

C
I, II and III

D
II and III

Submit Test

Air Pollution T...

Question 1

Water that can be used for bathing and washing and not fit for drinking

Water safe for drinking purpose

Water that can be easily accessible

Water that can easily be transported from one place to another

Question 2

(1)

(2)

(3)

(4)

Question 3

The concentration of a toxic substance is above natural levels.

The concentration of a toxic substance is not above natural levels.

The presence of any undesirable substance that lowers the quality of water even if it is not harmful to humans.

The presence of any undesirable substance that lowers the quality of water and is harmful to humans.

Question 4

Factories

Sewage treatment plants

Urban and suburban lands

All of the above

Question 5

more, less

less, medium

medium, more

less, more

Question 6

leaky sewers

poorly constructed and abandoned wells

poorly constructed and abandoned septic tanks

All of the above

Question 7

pathogens

reduction in O2

clogging of gills by silt

foul smell

Question 8

effluent

sewage

sludge

slurry

Question 9

Lead dust from the exhaust fumes of vehicles

Chemical fertilisers, insecticides and pesticides, washed off from surrounding lands

Human and livestock wastes

None of these

Question 10

(1)

(2)

(3)

(4)

Question 11

(1)

(2)

(3)

(4)

Question 12

Respiration

Burning of fuels

Dissolution in water bodies

Volcanic eruptions

Question 13

(1)

(2)

(3)

(4)

Question 14

Troposphere

Stratosphere

Mesosphere

Thermosphere

Question 15

Thermosphere

Troposphere

Mesosphere

Stratosphere

Question 16

Hydrocarbons

Nitrogen oxides

Carbon dioxide

reduction in O₂