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 is not the affect of polluted air on environment

Question # 2

Spraying of DDT produces pollution of

Question # 3

In the atmosphere, O2is about

Question # 4

The amount of oxygen in the lithosphere is about

Question # 5

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

Question # 6

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

Question # 7

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

Question # 8

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

Question # 9

Water is often treated with chlorine to

Question # 10

B.O.D is connected with

Question # 11

Ozone hole refers to

Question # 12

Which gas is not a constituent of atmosphere

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

Water pollution is mainly due to

Question # 17

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

Question # 18

Which one is the most toxic?

Question # 19

Acid rain is due to increase in atmospheric concentration of

Question # 20

Ecosystem is a smaller unit of

Question # 21

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

Question # 22

Carbon monoxide is pollutant as it

Question # 23

Drained sewage has B.O.D

Question # 24

Pick up the correct statement

Question # 25

Biodegradable pollutant is

Question # 26

Sulphur dioxide affects

Question # 27

The largest item which is recycled is

Question # 28

Exposure to CO results in

Question # 29

Ecology is a science of environment and deals specially with

Question # 30

In incinerating the waste is burnt at

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2
2 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
3 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
4 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
5 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
6 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
7 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
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 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action
10 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
A. Ag+
B. Cu2+
C. Al3+
D. Si4+

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