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

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

Question # 2

Potable water is considered to be

Question # 3

B.O.D is connected with

Question # 4

Atmosphere of big/metropolitan cities is polluted most by

Question # 5

Which of the following is not an air

Question # 6

Soil remediation means

Question # 7

Shahi Qilla may be destroyed by

Question # 8

SO2and NO2produce pollution by increasing

Question # 9

Carbon monoxide is harmful to human beings as it

Question # 10

Which gasses are produced from landfills

Question # 11

Swage water is purified by

Question # 12

Drained sewage has B.O.D

Question # 13

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 # 14

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

Question # 15

Chromium (VI) is highly toxic and can cause

Question # 16

Soil salinity can be measured by

Question # 17

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 18

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

Question # 19

Ultraviolet radiation from sun causes a reaction that produces

Question # 20

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

Question # 21

Ozone hole refers to

Question # 22

Water is often treated with chlorine to

Question # 23

The region of earth capable of supporting life is

Question # 24

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

Question # 25

Which is not a component of environment

Question # 26

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

Question # 27

Spraying of DDT produces pollution of

Question # 28

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

Question # 29

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

Question # 30

The film forming components of paints are

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
2 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
3 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
4 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
5 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
6 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
7 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
8 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
9 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
10 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil

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