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

The amount of oxygen in the lithosphere is about

Question # 2

Which one of the following is not air pollutant gas

Question # 3

Which gasses are produced from landfills

Question # 4

Shahi Qilla may be destroyed by

Question # 5

Ultraviolet radiation from sun causes a reaction that produces

Question # 6

Which heavy metals do not have any safe limits

Question # 7

Photochemical smog is caused by

Question # 8

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 9

SO2Makes ______ acid rains

Question # 10

The amount of Si in the lithosphere is about

Question # 11

Domestic waste mostly constitutes

Question # 12

Ecosystem is a smaller unit of

Question # 13

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

Question # 14

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

Question # 15

Drawback DDT as presticide is

Question # 16

What is the cause of water pollution

Question # 17

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 18

Water which his considered to be safe for human consumption is known as

Question # 19

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 # 20

Which of the following is not an air

Question # 21

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

Question # 22

Phosphate pollution is caused by

Question # 23

The largest item which is recycled is

Question # 24

Which is not the condition for the formation of smog

Question # 25

BOD is

Question # 26

Result of ozone hole is

Question # 27

Chloroflurocarbon releases a chemical harmful to ozone

Question # 28

Chief air pollutant which is likely to deplete ozone layer

Question # 29

Pollution is

Question # 30

Which step is unnecessary for purification of water for drinking purposes

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
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 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
4 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
5 In the atmosphere, O2is about
A. 10%
B. 15%
C. 21%
D. 25%
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 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
8 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
9 NO and NO2gases in atmosphere are represented by
A. NO
B. NO4
C. NOx
D. NxOy
10 Result of ozone hole is
A. Green house effect
B. Global warming
C. Acid rain
D. UV rays reach the earth

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