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

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

Question # 2

Increased asthmatic attacks in certain seasons are related to

Question # 3

Acid rain is due to increase in atmospheric concentration of

Question # 4

Classical smog occurs in palces of

Question # 5

Which is not the affect of polluted air on environment

Question # 6

Minamata disease is due to pollution of

Question # 7

BOD is

Question # 8

Atomospheric pollutant is

Question # 9

Soil salinity can be measured by

Question # 10

Which one is the most toxic?

Question # 11

The amount of oxygen in the lithosphere is about

Question # 12

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

Question # 13

In purification of potable water the coagulant used is

Question # 14

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

Question # 15

Oceans cove ______ percent of the surface of the earth

Question # 16

Atmosphere of big/metropolitan cities is polluted most by

Question # 17

Ecosystem is a smaller unit of

Question # 18

The region of earth capable of supporting life is

Question # 19

Depletion of ozone layer is due to

Question # 20

Which is not a method for solid waste management

Question # 21

Photochemical smog is caused by

Question # 22

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

Question # 23

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

Question # 24

Polycyolic aromatic hydrocarbons are taught to be

Question # 25

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

Question # 26

Which of the following is not an air

Question # 27

Pollution is

Question # 28

Ozone hole is maximum over

Question # 29

The normal amount of overhead ozone is about

Question # 30

The pH range of the acid rain is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
2 Which step is unnecessary for purification of water for drinking purposes
A. Aeration
B. Coagulation
C. Treatment with chlorine
D. Treatment with iodine
3 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
4 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these
5 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
6 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
7 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
8 When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
A. Uninfluenced by occurrence of thuderstorm
B. Which depends on the amount of dust in air
C. Slightly lower than that of rain water without thunderstorm
D. Slighlty higher than that when the thunderstom is not there
9 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
10 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons

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