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

Which causes water pollution?

Question # 2

Drained sewage has B.O.D

Question # 3

Which one of the following is not air pollutant gas

Question # 4

A pollutant affects

Question # 5

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

Question # 6

In the atmosphere, O2is about

Question # 7

Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called

Question # 8

Minamata disease is due to pollution of

Question # 9

Which one is not a pollutant normally?

Question # 10

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

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

Atmosphere of big/metropolitan cities is polluted most by

Question # 13

Ecosystem is a smaller unit of

Question # 14

In purification of potable water the coagulant used is

Question # 15

Which step is unnecessary for purification of water for drinking purposes

Question # 16

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 # 17

Water pollution is mainly due to

Question # 18

Domestic waste mostly constitutes

Question # 19

Eutrophication causes reduction in

Question # 20

Photochemical smog is caused by

Question # 21

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

Question # 22

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

Question # 23

Mottling of teeth is due to presence of an element in drinking water

Question # 24

Which is not the condition for the formation of smog

Question # 25

Chloroflurocarbon releases a chemical harmful to ozone

Question # 26

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

Question # 27

NO and NO2gases in atmosphere are represented by

Question # 28

Polycyolic aromatic hydrocarbons are taught to be

Question # 29

Shahi Qilla may be destroyed by

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
2 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
3 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
4 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
5 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
6 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
7 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
8 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
9 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
10 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above

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