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

Ozone hole is maximum over

Question # 2

Which is not a component of environment

Question # 3

The amount of Si in the lithosphere is about

Question # 4

BOD is

Question # 5

In the atmosphere, CO2is about

Question # 6

Ozone depletion in stratosphere shall result in

Question # 7

When chlorofluoro carbon are subjected to U.V. they form

Question # 8

Oceans cove ______ percent of the surface of the earth

Question # 9

Soil salinity can be measured by

Question # 10

Most hazardous metal pollutant of automobile exhaust is

Question # 11

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

Question # 12

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 13

Sulphur dioxide affects

Question # 14

Water is often treated with chlorine to

Question # 15

Chromium (VI) is highly toxic and can cause

Question # 16

Eutrophication causes reduction in

Question # 17

In the atmosphere, O2is about

Question # 18

Atmosphere of big/metropolitan cities is polluted most by

Question # 19

Environmental pollution affects

Question # 20

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

Question # 21

Which of the following human activities are contaminating surface and ground waters

Question # 22

UV radiations bring about

Question # 23

A single chlorine free radical can destroy how many ozone molecules

Question # 24

Which is not the affect of polluted air on environment

Question # 25

Exposure to CO results in

Question # 26

What is the cause of water pollution

Question # 27

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

Question # 28

DDT is

Question # 29

Fungicides are the pesticides which

Question # 30

Shahi Qilla may be destroyed by

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
2 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
3 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
A. Iodine
B. Bromine
C. Lead
D. Carbon
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
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain
5 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
6 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
7 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
8 Which is not the affect of polluted air on environment
A. Acid rain
B. Smog
C. Ozone
D. Global warming
9 Swage water is purified by
A. Microorganisms
B. Light
C. Fishes
D. Aquatic plants
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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