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 layer of stratosphere requires protection from indiscriminate use of

Question # 2

Eutrophication causes reduction in

Question # 3

Ozone hole is maximum over

Question # 4

Soil remediation means

Question # 5

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

Question # 6

Pollution is

Question # 7

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

Question # 8

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

Question # 9

What is the cause of water pollution

Question # 10

Water is often treated with chlorine to

Question # 11

Spraying of DDT produces pollution of

Question # 12

Which one is not a pollutant normally?

Question # 13

Phosphate pollution is caused by

Question # 14

Drained sewage has B.O.D

Question # 15

DDT is

Question # 16

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 17

In the atmosphere, CO2is about

Question # 18

Soil salinity can be measured by

Question # 19

Domestic waste mostly constitutes

Question # 20

Increasing skin cancer and high mutation rate are due to

Question # 21

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

Question # 22

Water which his considered to be safe for human consumption is known as

Question # 23

Which is not a component of environment

Question # 24

Which heavy metals do not have any safe limits

Question # 25

Which causes water pollution?

Question # 26

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 # 27

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

Question # 28

Ultraviolet radiation from sun causes a reaction that produces

Question # 29

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Question # 30

Photochemical smog is caused by

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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 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
3 Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called
A. Primary pollutant
B. Secondary pollutant
C. Tertiary pollutant
D. None of these
4 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
5 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
6 A pollutant affects
A. Human health
B. Quality of life
C. Functioning of ecosystem
D. All of these
7 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above
8 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
9 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
10 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic

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