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

Pick up the correct statement

Question # 2

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 # 3

Chief source of water and soil pollution is

Question # 4

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

Question # 5

Spraying of DDT produces pollution of

Question # 6

In the atmosphere, CO2is about

Question # 7

Shahi Qilla may be destroyed by

Question # 8

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

Question # 9

Domestic waste mostly constitutes

Question # 10

Which is not the affect of polluted air on environment

Question # 11

The film forming components of paints are

Question # 12

Biodegradable pollutant is

Question # 13

Chromium (VI) is highly toxic and can cause

Question # 14

Soil remediation means

Question # 15

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

Question # 16

Depletion of ozone layer is due to

Question # 17

Ultraviolet radiation from sun causes a reaction that produces

Question # 18

In purification of potable water the coagulant used is

Question # 19

Water is often treated with chlorine to

Question # 20

Which gasses are produced from landfills

Question # 21

SO2and NO2produce pollution by increasing

Question # 22

Which gas is not a constituent of atmosphere

Question # 23

Which causes water pollution?

Question # 24

Chromium (VI) is highly toxic and can cause

Question # 25

Which heavy metals do not have any safe limits

Question # 26

Most hazardous metal pollutant of automobile exhaust is

Question # 27

Atmosphere of big/metropolitan cities is polluted most by

Question # 28

Atomospheric pollutant is

Question # 29

Sulphur dioxide affects

Question # 30

A pollutant affects

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
3 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
4 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
5 The normal amount of overhead ozone is about
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
6 Spraying of DDT produces pollution of
A. Air
B. Air and water
C. Air and soil
D. Air, water and soil
7 Minamata disease is due to pollution of
A. Organic waste into drinking water
B. Oil spill in water
C. Industrial waste containing mercury into fishing water
D. Arsenic into the atmosphere
8 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
9 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
10 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out

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