ECAT Pre Engineering Chemistry Chapter 27 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 27 Environmental Chemistry

Try The MCQ's Test For ECAT Chemistry Chapter 27 Environmental Chemistry

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ECAT Chemistry Chapter 27 Environmental Chemistry

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Question # 1

Mottling of teeth is due to presence of an element in drinking water

Question # 2

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 3

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

Question # 4

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

Question # 5

Classical smog occurs in palces of

Question # 6

DDT is

Question # 7

The film forming components of paints are

Question # 8

Which step is unnecessary for purification of water for drinking purposes

Question # 9

The pH range of the acid rain is

Question # 10

BOD is

Question # 11

Chromium (VI) is highly toxic and can cause

Question # 12

Ozone hole is maximum over

Question # 13

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

Question # 14

Acid rain is due to increase in atmospheric concentration of

Question # 15

In the atmosphere, O2is about

Question # 16

Chromium (VI) is highly toxic and can cause

Question # 17

Air pollution is not caused by

Question # 18

Increased asthmatic attacks in certain seasons are related to

Question # 19

Water pollution is mainly due to

Question # 20

Shahi Qilla may be destroyed by

Question # 21

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 22

Minamata disease is due to pollution of

Question # 23

Chief air pollutant which is likely to deplete ozone layer

Question # 24

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

Question # 25

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 26

In incinerating the waste is burnt at

Question # 27

Which one is the most toxic?

Question # 28

Which of the following human activities are contaminating surface and ground waters

Question # 29

Sulphur dioxide affects

Question # 30

Atomospheric pollutant is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
2 What is the cause of water pollution
A. Chemical and bacterial contents in live stock
B. The spilled oil in rivers and ponds
C. Wide spread use of pesticides
D. All of the above
3 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
4 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
5 Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution
A. Live stock waste
B. Agricultural pesticides
C. Oil breaks and spills
D. All of the above
6 Ozone in most of the tropical regions acts as a pollutant and causes
A. Damages to eyes
B. Aggravates asthma
C. Chest discomfort
D. All of these
7 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
8 Drained sewage has B.O.D
A. More than that of water
B. Less than that of water
C. Equal to that of water
D. None of the above
9 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above
10 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone

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