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

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

Question # 3

Chief air pollutant which is likely to deplete ozone layer

Question # 4

Spraying of DDT produces pollution of

Question # 5

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

Question # 6

BOD is

Question # 7

The amount of Si in the lithosphere is about

Question # 8

Which one is the major reason for pollution in high cities?

Question # 9

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

Question # 10

As it passes into food chain, the concentration of DDT

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Atomospheric pollutant is

Question # 16

Most hazardous metal pollutant of automobile exhaust is

Question # 17

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

Question # 18

Carbon monoxide is pollutant as it

Question # 19

The amount of oxygen in the lithosphere is about

Question # 20

Shahi Qilla may be destroyed by

Question # 21

Pick up the correct statement

Question # 22

Phosphate pollution is caused by

Question # 23

Which one of the following is not air pollutant gas

Question # 24

Which is not a method for solid waste management

Question # 25

Ecology is a science of environment and deals specially with

Question # 26

Atmosphere of big/metropolitan cities is polluted most by

Question # 27

Water is often treated with chlorine to

Question # 28

Which gasses are produced from landfills

Question # 29

Ecosystem is a smaller unit of

Question # 30

Which is not the condition for the formation of smog

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called
A. Primary pollutant
B. Secondary pollutant
C. Tertiary pollutant
D. None of these
2 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2
3 Which factor is helping to reduce the environmental pollution
A. Rapid growth of population
B. Urbanization
C. Industrialization
D. Increase of plantation
4 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
5 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
6 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
7 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2
8 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
9 Acid rains are produced by
A. Excess NO2and SO2 from burining fossil fuels
B. Excess production of NH3by industry and coal gas
C. Excess release of carbon monoxide by incomplete combustion
D. Excess formation of CO2by combustion and animal respiration
10 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
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain

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