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

Acid rains are produced by

Question # 2

Phosphate pollution is caused by

Question # 3

Potable water is considered to be

Question # 4

Which of the following is not an air

Question # 5

Ultraviolet radiation from sun causes a reaction that produces

Question # 6

Fungicides are the pesticides which

Question # 7

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 # 8

Minamata disease is due to pollution of

Question # 9

Carbon monoxide is pollutant as it

Question # 10

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

Question # 11

The pH range of the acid rain is

Question # 12

Which heavy metals do not have any safe limits

Question # 13

Which is not the condition for the formation of smog

Question # 14

Burning of fossil fuels is the main source of pollution

Question # 15

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 16

Atmosphere of big/metropolitan cities is polluted most by

Question # 17

Water pollution is mainly due to

Question # 18

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

Question # 19

Ozone hole refers to

Question # 20

What is the cause of water pollution

Question # 21

Pollution is

Question # 22

The amount of Si in the lithosphere is about

Question # 23

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

Question # 24

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

Question # 25

Most hazardous metal pollutant of automobile exhaust is

Question # 26

The region of earth capable of supporting life is

Question # 27

Which is not a component of environment

Question # 28

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

Question # 29

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

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 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
2 Drained sewage has B.O.D
A. More than that of water
B. Less than that of water
C. Equal to that of water
D. None of the above
3 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
A. SO2
B. NO2
C. CO
D. A and b only
4 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
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having flouring trapped in it
D. Use a sorbent having Al2O3trapped in it
5 SO2Makes ______ acid rains
A. Carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these
6 The pH of the rain water in areas where acid rain is the cause of pollution may be
A. 6.5
B. 5.6
C. 4.5
D. 2.2
7 Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
A. Fullerences
B. Freons
C. Polyhalogens
D. Ferrocene
8 Pollution is
A. Removal of top soill
B. Release of toxic/undesirable materials in enevironment
C. Conversation of energy
D. All the above
9 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
10 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides

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