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

00:00
Question # 1

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

Question # 2

Oceans cove ______ percent of the surface of the earth

Question # 3

Water is often treated with chlorine to

Question # 4

Classical smog occurs in palces of

Question # 5

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 6

Which factor is helping to reduce the environmental pollution

Question # 7

Pollution is

Question # 8

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Question # 9

SO2Makes ______ acid rains

Question # 10

Chromium (VI) is highly toxic and can cause

Question # 11

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Question # 12

Chief source of water and soil pollution is

Question # 13

The amount of oxygen in the lithosphere is about

Question # 14

Carbon monoxide is harmful to human beings as it

Question # 15

A pollutant affects

Question # 16

Which gasses are produced from landfills

Question # 17

Fungicides are the pesticides which

Question # 18

Exposure to CO results in

Question # 19

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 20

Which is not a component of environment

Question # 21

In incinerating the waste is burnt at

Question # 22

Increased asthmatic attacks in certain seasons are related to

Question # 23

Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due

Question # 24

Swage water is purified by

Question # 25

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

Question # 26

Which of the following forms a toxic substance in blood by combing with hemoglobin?

Question # 27

Soil remediation means

Question # 28

When chlorofluoro carbon are subjected to U.V. they form

Question # 29

What is the cause of water pollution

Question # 30

A single chlorine free radical can destroy how many ozone molecules

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 Which one is the major reason for pollution in high cities?
A. Fossil fuel
B. Acid rain
C. Heat dispersion
D. None of the above
4 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost
5 A pollutant affects
A. Human health
B. Quality of life
C. Functioning of ecosystem
D. All of these
6 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
7 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
8 Shahi Qilla may be destroyed by
A. Flood in Ravi
B. Temperature mediated spoilage of marble
C. Air pollutants from Lahore chemical industries
D. All the above
9 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
10 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems

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