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

Increasing skin cancer and high mutation rate are due to

Question # 2

Environmental pollution affects

Question # 3

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 4

Chromium (VI) is highly toxic and can cause

Question # 5

Exposure to CO results in

Question # 6

Shahi Qilla may be destroyed by

Question # 7

Phosphate pollution is caused by

Question # 8

Ozone in most of the tropical regions acts as a pollutant and causes

Question # 9

The amount of Si in the lithosphere is about

Question # 10

Swage water is purified by

Question # 11

Ultraviolet radiation from sun causes a reaction that produces

Question # 12

Which of the following is not an air

Question # 13

Which causes water pollution?

Question # 14

Which of the following waste material is not recycled for use again

Question # 15

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

Question # 16

The region of earth capable of supporting life is

Question # 17

Most hazardous metal pollutant of automobile exhaust is

Question # 18

Which gasses are produced from landfills

Question # 19

DDT is

Question # 20

Ecology is a science of environment and deals specially with

Question # 21

Classical smog occurs in palces of

Question # 22

Which one is the major reason for pollution in high cities?

Question # 23

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

Question # 24

In purification of potable water the coagulant used is

Question # 25

Which one is not a pollutant normally?

Question # 26

Ozone depletion in stratosphere shall result in

Question # 27

Chief air pollutant which is likely to deplete ozone layer

Question # 28

Drawback DDT as presticide is

Question # 29

The amount of oxygen in the lithosphere is about

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
A. Low value
B. Higher value
C. Both values
D. None of these
3 Pick up the correct statement
A. CO which is major pollutant resulting from the combustion of fuels in automobile plays a major role in photochemical smog
B. Classical smog has an oxidizing character while the phtochemical smog is reducing in character
C. Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours
D. During formation of smog the level of ozone in the atmosphere goes down
4 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
5 NO and NO2gases in atmosphere are represented by
A. NO
B. NO4
C. NOx
D. NxOy
6 Water which his considered to be safe for human consumption is known as
A. Distilled water
B. Contaminated water
C. Potable water
D. Rain water
7 Ozone layer of stratosphere requires protection from indiscriminate use of
A. Fungicides, insecticides, bactericides and medicines
B. Aerosols and high flying jets
C. Atomic explosions and industrial wastes
D. Baloons and turbo-prop aeroplanes
8 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
9 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane
10 Surface and ground water sources are contaminated by various human activities. Which of the followings is not a human activity that causes contamination in fresh water
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain

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