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

Burning of fossil fuels is the main source of pollution

Question # 2

Result of ozone hole is

Question # 3

Soil remediation means

Question # 4

Which is not the affect of polluted air on environment

Question # 5

Drawback DDT as presticide is

Question # 6

Which one of the following is not air pollutant gas

Question # 7

Which gasses are produced from landfills

Question # 8

Which heavy metals do not have any safe limits

Question # 9

Carbon monoxide is harmful to human beings as it

Question # 10

The amount of Si in the lithosphere is about

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

NO and NO2gases in atmosphere are represented by

Question # 13

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

Question # 14

Which is not the condition for the formation of smog

Question # 15

Carbon monoxide is pollutant as it

Question # 16

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 17

The region of earth capable of supporting life is

Question # 18

Chromium (VI) is highly toxic and can cause

Question # 19

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

Question # 20

The amount of oxygen in the lithosphere is about

Question # 21

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 22

Increased asthmatic attacks in certain seasons are related to

Question # 23

Increasing skin cancer and high mutation rate are due to

Question # 24

Eutrophication causes reduction in

Question # 25

Cyclone collector is used for minimizing

Question # 26

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 27

Pick up the correct statement

Question # 28

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 29

Photochemical smog is caused by

Question # 30

In the atmosphere, O2is about

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
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 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 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
6 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+
7 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
8 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
9 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
10 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

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