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

Chief source of water and soil pollution is

Question # 2

Which is not a method for solid waste management

Question # 3

Water is often treated with chlorine to

Question # 4

As it passes into food chain, the concentration of DDT

Question # 5

Exposure to CO results in

Question # 6

Acid rain is due to increase in atmospheric concentration of

Question # 7

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 8

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

Question # 9

Ozone hole refers to

Question # 10

Increased asthmatic attacks in certain seasons are related to

Question # 11

Which factor is helping to reduce the environmental pollution

Question # 12

Environmental pollution affects

Question # 13

SO2and NO2produce pollution by increasing

Question # 14

Ultraviolet radiation from sun causes a reaction that produces

Question # 15

Ecosystem is a smaller unit of

Question # 16

Which of the following is not an air

Question # 17

Biodegradable pollutant is

Question # 18

The region of earth capable of supporting life is

Question # 19

Minamata disease is due to pollution of

Question # 20

Swage water is purified by

Question # 21

Result of ozone hole is

Question # 22

Pollution is

Question # 23

Potable water is considered to be

Question # 24

A single chlorine free radical can destroy how many ozone molecules

Question # 25

Which step is unnecessary for purification of water for drinking purposes

Question # 26

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 # 27

Chromium (VI) is highly toxic and can cause

Question # 28

Which one is the most toxic?

Question # 29

Shahi Qilla may be destroyed by

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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+
2 Water which his considered to be safe for human consumption is known as
A. Distilled water
B. Contaminated water
C. Potable water
D. Rain water
3 Which of the following human activities are contaminating surface and ground waters
A. Pesticides
B. Septic tanks
C. Petroleum and natural gas production
D. All of these
4 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
5 Which of the following is not an air
A. N2
B. N2O
C. NO
D. CO
6 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
7 Increased asthmatic attacks in certain seasons are related to
A. Inhalation of seasonal pollen
B. Eating of seasonal vegetables
C. Low temperature
D. Wet and dry environment
8 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
9 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
10 Which is not the affect of polluted air on environment
A. Acid rain
B. Smog
C. Ozone
D. Global warming

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