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

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Question # 1

Which gasses are produced from landfills

Question # 2

Which one is the most toxic?

Question # 3

BOD is

Question # 4

Ecosystem is a smaller unit of

Question # 5

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 # 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

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

Question # 8

Water which his considered to be safe for human consumption is known as

Question # 9

The normal amount of overhead ozone is about

Question # 10

SO2and NO2produce pollution by increasing

Question # 11

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

Question # 12

In the atmosphere, O2is about

Question # 13

Ozone hole refers to

Question # 14

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

Question # 15

Which heavy metals do not have any safe limits

Question # 16

The pH range of the acid rain is

Question # 17

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

Question # 18

Acid rain is due to increase in atmospheric concentration of

Question # 19

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

Question # 20

SO2Makes ______ acid rains

Question # 21

Which one of the following is not air pollutant gas

Question # 22

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

Question # 23

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 24

Biodegradable pollutant is

Question # 25

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

Question # 26

In the atmosphere, CO2is about

Question # 27

The region of earth capable of supporting life is

Question # 28

Chief air pollutant which is likely to deplete ozone layer

Question # 29

Chloroflurocarbon releases a chemical harmful to ozone

Question # 30

What is the cause of water pollution

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
2 Pick up the correct statement
A. CO which is major pollutant resulting from the combustion of fuels in automobile plays a major role in photochemical smog
B. Classical smog has an oxidizing character while the phtochemical smog is reducing in character
C. Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours
D. During formation of smog the level of ozone in the atmosphere goes down
3 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
4 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
5 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
6 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
7 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
8 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
9 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
10 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2

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