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

Atomospheric pollutant is

Question # 2

Ozone depletion in stratosphere shall result in

Question # 3

Air pollution is not caused by

Question # 4

SO2and NO2produce pollution by increasing

Question # 5

Which heavy metals do not have any safe limits

Question # 6

Chloroflurocarbon releases a chemical harmful to ozone

Question # 7

The amount of Si in the lithosphere is about

Question # 8

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

Question # 9

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

Question # 10

Acid rain is due to increase in atmospheric concentration of

Question # 11

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

Question # 12

Carbon monoxide is harmful to human beings as it

Question # 13

Which of the following waste material is not recycled for use again

Question # 14

Domestic waste mostly constitutes

Question # 15

The pH range of the acid rain is

Question # 16

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 17

Increased asthmatic attacks in certain seasons are related to

Question # 18

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

Question # 19

Which causes water pollution?

Question # 20

Ozone hole refers to

Question # 21

BOD is

Question # 22

Eutrophication causes reduction in

Question # 23

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 # 24

Ecology is a science of environment and deals specially with

Question # 25

Which is not the affect of polluted air on environment

Question # 26

B.O.D is connected with

Question # 27

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

Question # 28

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

Question # 29

Chief source of water and soil pollution is

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum
2 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
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 One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having flouring trapped in it
D. Use a sorbent having Al2O3trapped in it
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 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
7 Fungicides are the pesticides which
A. Control the growth of fungus
B. Kill insects
C. Kill plants
D. Kill herbs
8 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
9 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
10 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%

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