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

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

Question # 2

Result of ozone hole is

Question # 3

Chromium (VI) is highly toxic and can cause

Question # 4

Soil salinity can be measured by

Question # 5

Drawback DDT as presticide is

Question # 6

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 # 7

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

Question # 8

Biodegradable pollutant is

Question # 9

Which heavy metals do not have any safe limits

Question # 10

Burning of fossil fuels is the main source of pollution

Question # 11

Ozone hole is maximum over

Question # 12

The pH range of the acid rain is

Question # 13

Which causes water pollution?

Question # 14

B.O.D is connected with

Question # 15

Drained sewage has B.O.D

Question # 16

DDT is

Question # 17

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

Question # 18

The film forming components of paints are

Question # 19

Soil remediation means

Question # 20

Atmosphere of big/metropolitan cities is polluted most by

Question # 21

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

Question # 22

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

Question # 23

Fungicides are the pesticides which

Question # 24

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

Question # 25

Ecology is a science of environment and deals specially with

Question # 26

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

Question # 27

Exposure to CO results in

Question # 28

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 # 29

Chloroflurocarbon releases a chemical harmful to ozone

Question # 30

Chief air pollutant which is likely to deplete ozone layer

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due
A. Combining with oxygen to form carbon dioxide
B. Destruction of hemoglobin
C. Preventing reaction between oxygen and hemoglobin
D. Forming stable compound with hemoglobin
2 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
3 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone
4 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
5 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
6 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2
7 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
8 Which of the following human activities are contaminating surface and ground waters
A. Pesticides
B. Septic tanks
C. Petroleum and natural gas production
D. All of these
9 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
10 Carbon monoxide is harmful to human beings as it
A. Is carcinogenic
B. Is antagonistic to CO2
C. Has higher affinity for hemoglobin as compared to oxygen
D. Is destructive to O3

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