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

Chief air pollutant which is likely to deplete ozone layer

Question # 2

Photochemical smog is caused by

Question # 3

Ozone depletion in stratosphere shall result in

Question # 4

Carbon monoxide is pollutant as it

Question # 5

Drained sewage has B.O.D

Question # 6

Which one is the most toxic?

Question # 7

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

Question # 8

Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due

Question # 9

The amount of Si in the lithosphere is about

Question # 10

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

Question # 11

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 12

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

Question # 13

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 # 14

Ultraviolet radiation from sun causes a reaction that produces

Question # 15

Most hazardous metal pollutant of automobile exhaust is

Question # 16

The region of earth capable of supporting life is

Question # 17

The pH range of the acid rain is

Question # 18

The % of CO2is the atmosphere is

Question # 19

Spraying of DDT produces pollution of

Question # 20

Which one is not a pollutant normally?

Question # 21

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

Question # 22

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

Question # 23

Classical smog occurs in palces of

Question # 24

Chromium (VI) is highly toxic and can cause

Question # 25

Pick up the correct statement

Question # 26

Water is often treated with chlorine to

Question # 27

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

Question # 28

A pollutant affects

Question # 29

Which of the following waste material is not recycled for use again

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 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
2 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
3 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
4 The pH range of the acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. Less than 5
5 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
6 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
A. Low value
B. Higher value
C. Both values
D. None of these
7 Which of the following waste material is not recycled for use again
A. Paper
B. Plastic
C. Hides of animals
D. Glass
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 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
10 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles

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