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

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

Question # 2

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

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

Which is not a method for solid waste management

Question # 5

Which of the following is not an air

Question # 6

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 7

The largest item which is recycled is

Question # 8

Biodegradable pollutant is

Question # 9

In the atmosphere, O2is about

Question # 10

DDT is

Question # 11

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

Question # 12

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

Question # 13

Soil salinity can be measured by

Question # 14

What is the cause of water pollution

Question # 15

Carbon monoxide is harmful to human beings as it

Question # 16

SO2Makes ______ acid rains

Question # 17

Water pollution is mainly due to

Question # 18

B.O.D is connected with

Question # 19

Which heavy metals do not have any safe limits

Question # 20

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 21

Which factor is helping to reduce the environmental pollution

Question # 22

Chromium (VI) is highly toxic and can cause

Question # 23

Swage water is purified by

Question # 24

Acid rains are produced by

Question # 25

Environmental pollution affects

Question # 26

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 # 27

Atomospheric pollutant is

Question # 28

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

Question # 29

Which is not the affect of polluted air on environment

Question # 30

Ozone hole is maximum over

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Ultraviolet radiation from sun causes a reaction that produces
A. Fluorides
B. Carbon monoxide
C. Sulphur dioxide
D. Ozone
2 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
3 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
4 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
5 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
A. Ag+
B. Cu2+
C. Al3+
D. Si4+
6 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
7 Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
A. Fullerences
B. Freons
C. Polyhalogens
D. Ferrocene
8 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
9 Which is not the condition for the formation of smog
A. There must be sufficient NO gas
B. There must be sunlight to help photo chemical reaction to take place
C. Air must be blowing swiftly
D. There must be SO2in the air
10 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2

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