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

Soil salinity can be measured by

Question # 2

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

Question # 3

Most hazardous metal pollutant of automobile exhaust is

Question # 4

Ozone hole refers to

Question # 5

The region of earth capable of supporting life is

Question # 6

Which one is not a pollutant normally?

Question # 7

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

Question # 8

Carbon monoxide is harmful to human beings as it

Question # 9

In purification of potable water the coagulant used is

Question # 10

Result of ozone hole is

Question # 11

Atomospheric pollutant is

Question # 12

The amount of oxygen in the lithosphere is about

Question # 13

Increased asthmatic attacks in certain seasons are related to

Question # 14

Which step is unnecessary for purification of water for drinking purposes

Question # 15

Which one of the following is not air pollutant gas

Question # 16

Drained sewage has B.O.D

Question # 17

Which one is the most toxic?

Question # 18

Chloroflurocarbon releases a chemical harmful to ozone

Question # 19

Carbon monoxide is pollutant as it

Question # 20

Pollution is

Question # 21

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

Question # 22

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

Question # 23

Potable water is considered to be

Question # 24

SO2and NO2produce pollution by increasing

Question # 25

Acid rains are produced by

Question # 26

NO and NO2gases in atmosphere are represented by

Question # 27

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

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

UV radiations bring about

Question # 30

Atmosphere of big/metropolitan cities is polluted most by

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
2 A pollutant affects
A. Human health
B. Quality of life
C. Functioning of ecosystem
D. All of these
3 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
A. 10,000
B. 20,000
C. 100,000
D. 50,000
4 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
5 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is non reactive chemically
6 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
7 Pollution is
A. Removal of top soill
B. Release of toxic/undesirable materials in enevironment
C. Conversation of energy
D. All the above
8 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
9 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
10 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

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