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

In Antarctica ozone depletion is due to the formation of following compound

Question # 3

Shahi Qilla may be destroyed by

Question # 4

Which heavy metals do not have any safe limits

Question # 5

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

Question # 6

Which is not the affect of polluted air on environment

Question # 7

Atomospheric pollutant is

Question # 8

Which one is not a pollutant normally?

Question # 9

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

Question # 10

Water is often treated with chlorine to

Question # 11

Result of ozone hole is

Question # 12

Drained sewage has B.O.D

Question # 13

DDT is

Question # 14

Atmosphere of big/metropolitan cities is polluted most by

Question # 15

Ozone hole refers to

Question # 16

SO2and NO2produce pollution by increasing

Question # 17

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 18

Burning of fossil fuels is the main source of pollution

Question # 19

Which step is unnecessary for purification of water for drinking purposes

Question # 20

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

Question # 21

A single chlorine free radical can destroy how many ozone molecules

Question # 22

Chloroflurocarbon releases a chemical harmful to ozone

Question # 23

Ultraviolet radiation from sun causes a reaction that produces

Question # 24

UV radiations bring about

Question # 25

Acid rain is due to increase in atmospheric concentration of

Question # 26

Carbon monoxide is pollutant as it

Question # 27

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

Question # 28

The region of earth capable of supporting life is

Question # 29

Sulphur dioxide affects

Question # 30

The amount of oxygen in the lithosphere is about

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Sulphur dioxide affects
A. Cell wall
B. Plasmodesmata
C. All membrane systems
D. Nucleus
2 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
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 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
5 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
6 A pollutant affects
A. Human health
B. Quality of life
C. Functioning of ecosystem
D. All of these
7 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
8 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
9 SO2Makes ______ acid rains
A. Carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these
10 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

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