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

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 # 3

Biodegradable pollutant is

Question # 4

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

Question # 5

Depletion of ozone layer is due to

Question # 6

Polycyolic aromatic hydrocarbons are taught to be

Question # 7

DDT is

Question # 8

Phosphate pollution is caused by

Question # 9

In the atmosphere, O2is about

Question # 10

Which one is not a pollutant normally?

Question # 11

Chief source of water and soil pollution is

Question # 12

Drawback DDT as presticide is

Question # 13

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

Question # 14

Ultraviolet radiation from sun causes a reaction that produces

Question # 15

Domestic waste mostly constitutes

Question # 16

Environmental pollution affects

Question # 17

The pH range of the acid rain is

Question # 18

Which gasses are produced from landfills

Question # 19

Increasing skin cancer and high mutation rate are due to

Question # 20

Shahi Qilla may be destroyed by

Question # 21

Photochemical smog is caused by

Question # 22

The largest item which is recycled is

Question # 23

Exposure to CO results in

Question # 24

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

Question # 25

Spraying of DDT produces pollution of

Question # 26

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

Question # 27

Ozone hole refers to

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

Which is not the condition for the formation of smog

Question # 30

Ozone depletion in stratosphere shall result in

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Result of ozone hole is
A. Green house effect
B. Global warming
C. Acid rain
D. UV rays reach the earth
3 Pollution is
A. Removal of top soill
B. Release of toxic/undesirable materials in enevironment
C. Conversation of energy
D. All the above
4 Which one is the major reason for pollution in high cities?
A. Fossil fuel
B. Acid rain
C. Heat dispersion
D. None of the above
5 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
6 Ozone depletion in stratosphere shall result in
A. Forest fires
B. Increased incidence of skin cancer
C. Global warming
D. None of the above
7 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
8 NO and NO2gases in atmosphere are represented by
A. NO
B. NO4
C. NOx
D. NxOy
9 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
10 Pick up the correct statement
A. CO which is major pollutant resulting from the combustion of fuels in automobile plays a major role in photochemical smog
B. Classical smog has an oxidizing character while the phtochemical smog is reducing in character
C. Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours
D. During formation of smog the level of ozone in the atmosphere goes down

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