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

Result of ozone hole is

Question # 2

Pick up the correct statement

Question # 3

Ecosystem is a smaller unit of

Question # 4

Exposure to CO results in

Question # 5

In Antarctica ozone depletion is due to the formation of following compound

Question # 6

Fungicides are the pesticides which

Question # 7

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

Question # 8

UV radiations bring about

Question # 9

BOD is

Question # 10

The % of CO2is the atmosphere is

Question # 11

Which one of the following is not air pollutant gas

Question # 12

Increased asthmatic attacks in certain seasons are related to

Question # 13

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

Question # 14

Water pollution is mainly due to

Question # 15

Chromium (VI) is highly toxic and can cause

Question # 16

Domestic waste mostly constitutes

Question # 17

As it passes into food chain, the concentration of DDT

Question # 18

The largest item which is recycled is

Question # 19

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

Question # 20

Which of the following is not an air

Question # 21

Most hazardous metal pollutant of automobile exhaust is

Question # 22

Soil salinity can be measured by

Question # 23

The amount of Si in the lithosphere is about

Question # 24

Spraying of DDT produces pollution of

Question # 25

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 26

Which one is the most toxic?

Question # 27

Photochemical smog is caused by

Question # 28

A pollutant affects

Question # 29

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

Question # 30

Drained sewage has B.O.D

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The pH of the rain water in areas where acid rain is the cause of pollution may be
A. 6.5
B. 5.6
C. 4.5
D. 2.2
2 In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
3 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
4 Which is not a component of environment
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
5 Ozone depletion in stratosphere shall result in
A. Forest fires
B. Increased incidence of skin cancer
C. Global warming
D. None of the above
6 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost
7 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
8 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2
9 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
10 SO2Makes ______ acid rains
A. Carbonic acid
B. Sulfuric
C. Nitric acid
D. All of these

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