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

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

Question # 2

Potable water is considered to be

Question # 3

Carbon monoxide is harmful to human beings as it

Question # 4

The pH range of the acid rain is

Question # 5

Which of the following is not an air

Question # 6

Oceans cove ______ percent of the surface of the earth

Question # 7

Atmosphere of big/metropolitan cities is polluted most by

Question # 8

Polycyolic aromatic hydrocarbons are taught to be

Question # 9

Carbon monoxide is pollutant as it

Question # 10

Water is often treated with chlorine to

Question # 11

Spraying of DDT produces pollution of

Question # 12

Pick up the correct statement

Question # 13

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

Question # 14

In the atmosphere, O2is about

Question # 15

Pollution is

Question # 16

UV radiations bring about

Question # 17

Increasing skin cancer and high mutation rate are due to

Question # 18

Mottling of teeth is due to presence of an element in drinking water

Question # 19

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 # 20

BOD is

Question # 21

The amount of Si in the lithosphere is about

Question # 22

Increased asthmatic attacks in certain seasons are related to

Question # 23

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

Question # 24

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

Question # 25

The largest item which is recycled is

Question # 26

Acid rains are produced by

Question # 27

Soil salinity can be measured by

Question # 28

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

Question # 29

In the atmosphere, CO2is about

Question # 30

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 B.O.D is connected with
A. Organic matter
B. Microbes
C. Mircrobes and organic matter
D. None of the above
2 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
3 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above
4 Domestic waste mostly constitutes
A. Non-biodegradable pollution
B. Biodegradable pollution
C. Effluents
D. Air pollution
5 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
A. Environment
B. Hydrosphere
C. Pollutant
D. Biosphere
6 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
7 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
8 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
9 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
10 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

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