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

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 2

Carbon monoxide is harmful to human beings as it

Question # 3

Polycyolic aromatic hydrocarbons are taught to be

Question # 4

Minamata disease is due to pollution of

Question # 5

A single chlorine free radical can destroy how many ozone molecules

Question # 6

Drained sewage has B.O.D

Question # 7

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

Question # 8

Which is not the affect of polluted air on environment

Question # 9

Which of the following is not an air

Question # 10

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

Question # 11

Increasing skin cancer and high mutation rate are due to

Question # 12

Pick up the correct statement

Question # 13

Soil salinity can be measured by

Question # 14

Sulphur dioxide affects

Question # 15

Domestic waste mostly constitutes

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

Chief air pollutant which is likely to deplete ozone layer

Question # 20

Exposure to CO results in

Question # 21

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

Question # 22

Which one of the following is not air pollutant gas

Question # 23

The amount of oxygen in the lithosphere is about

Question # 24

Which is not a method for solid waste management

Question # 25

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

Question # 26

Phosphate pollution is caused by

Question # 27

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 # 28

Eutrophication causes reduction in

Question # 29

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

Question # 30

Water is often treated with chlorine to

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
2 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
3 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these
4 Fungicides are the pesticides which
A. Control the growth of fungus
B. Kill insects
C. Kill plants
D. Kill herbs
5 Phosphate pollution is caused by
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers
6 In Antarctica ozone depletion is due to the formation of following compound
A. Acrolein
B. Peroxy acetyl nitrate
C. SO2and SO3
D. Chlorine nitrate
7 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
8 Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution
A. Live stock waste
B. Agricultural pesticides
C. Oil breaks and spills
D. All of the above
9 Which one is the major reason for pollution in high cities?
A. Fossil fuel
B. Acid rain
C. Heat dispersion
D. None of the above
10 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

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