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

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

Question # 2

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

Question # 3

Exposure to CO results in

Question # 4

Carbon monoxide is pollutant as it

Question # 5

A single chlorine free radical can destroy how many ozone molecules

Question # 6

The film forming components of paints are

Question # 7

BOD is

Question # 8

Classical smog occurs in palces of

Question # 9

Polycyolic aromatic hydrocarbons are taught to be

Question # 10

In purification of potable water the coagulant used is

Question # 11

Chief air pollutant which is likely to deplete ozone layer

Question # 12

Which one is the most toxic?

Question # 13

Atomospheric pollutant is

Question # 14

Which is not a component of environment

Question # 15

Which one is not a pollutant normally?

Question # 16

Which gas is not a constituent of atmosphere

Question # 17

Pick up the correct statement

Question # 18

In incinerating the waste is burnt at

Question # 19

Which one of the following is not air pollutant gas

Question # 20

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

Question # 21

Photochemical smog is caused by

Question # 22

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

Question # 23

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 # 24

Increased asthmatic attacks in certain seasons are related to

Question # 25

Fungicides are the pesticides which

Question # 26

Which heavy metals do not have any safe limits

Question # 27

Water is often treated with chlorine to

Question # 28

Cyclone collector is used for minimizing

Question # 29

Carbon monoxide is harmful to human beings as it

Question # 30

Potable water is considered to be

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Domestic waste mostly constitutes
A. Non-biodegradable pollution
B. Biodegradable pollution
C. Effluents
D. Air pollution
2 Which gasses are produced from landfills
A. NH3
B. H2S
C. N2
D. All of these
3 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
4 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
5 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
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 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
8 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
9 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
10 Ozone hole is maximum over
A. Europe
B. Antarctica
C. Asia
D. Africa

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