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

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

Question # 2

Oceans cove ______ percent of the surface of the earth

Question # 3

Biodegradable pollutant is

Question # 4

Atmosphere of big/metropolitan cities is polluted most by

Question # 5

Drawback DDT as presticide is

Question # 6

Which one is not a pollutant normally?

Question # 7

Fungicides are the pesticides which

Question # 8

When chlorofluoro carbon are subjected to U.V. they form

Question # 9

BOD is

Question # 10

Acid rain is due to increase in atmospheric concentration of

Question # 11

Spraying of DDT produces pollution of

Question # 12

UV radiations bring about

Question # 13

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

Question # 14

The region of earth capable of supporting life is

Question # 15

Pollution is

Question # 16

The % of CO2is the atmosphere is

Question # 17

Burning of fossil fuels is the main source of pollution

Question # 18

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

Question # 19

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 # 20

Polycyolic aromatic hydrocarbons are taught to be

Question # 21

Increased asthmatic attacks in certain seasons are related to

Question # 22

A pollutant affects

Question # 23

Ozone depletion in stratosphere shall result in

Question # 24

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

Question # 25

Water pollution is mainly due to

Question # 26

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

Question # 27

Which factor is helping to reduce the environmental pollution

Question # 28

Which one is the most toxic?

Question # 29

Cyclone collector is used for minimizing

Question # 30

In purification of potable water the coagulant used 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 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+
3 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
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 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost
6 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
7 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
8 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin
9 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
10 Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution
A. Live stock waste
B. Agricultural pesticides
C. Oil breaks and spills
D. All of the above

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