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 film forming components of paints are

Question # 2

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 # 3

Which causes water pollution?

Question # 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

Question # 5

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

Question # 6

Which one of the following is not air pollutant gas

Question # 7

Oceans cove ______ percent of the surface of the earth

Question # 8

Pick up the correct statement

Question # 9

Ecosystem is a smaller unit of

Question # 10

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

Question # 11

Drawback DDT as presticide is

Question # 12

Which heavy metals do not have any safe limits

Question # 13

Result of ozone hole is

Question # 14

Air pollution is not caused by

Question # 15

DDT is

Question # 16

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

Question # 17

Which is not a method for solid waste management

Question # 18

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 # 19

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Question # 20

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 21

UV radiations bring about

Question # 22

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

Question # 23

The normal amount of overhead ozone is about

Question # 24

Water is often treated with chlorine to

Question # 25

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

Question # 26

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

Question # 27

Chromium (VI) is highly toxic and can cause

Question # 28

Increasing skin cancer and high mutation rate are due to

Question # 29

SO2Makes ______ acid rains

Question # 30

Ultraviolet radiation from sun causes a reaction that produces

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above
2 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
3 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
4 SO2Makes ______ acid rains
A. Carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these
5 Soil remediation means
A. To make it suitable for cultivation of crops
B. To make it acidic
C. To make it alkeline
D. To add manure into it
6 When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
A. Uninfluenced by occurrence of thuderstorm
B. Which depends on the amount of dust in air
C. Slightly lower than that of rain water without thunderstorm
D. Slighlty higher than that when the thunderstom is not there
7 What is the cause of water pollution
A. Chemical and bacterial contents in live stock
B. The spilled oil in rivers and ponds
C. Wide spread use of pesticides
D. All of the above
8 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
9 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
10 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%

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