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

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

Question # 2

Which is not a component of environment

Question # 3

Acid rains are produced by

Question # 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

Question # 5

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

Question # 6

The largest item which is recycled is

Question # 7

Ecosystem is a smaller unit of

Question # 8

Phosphate pollution is caused by

Question # 9

Which is not a method for solid waste management

Question # 10

Which gasses are produced from landfills

Question # 11

A single chlorine free radical can destroy how many ozone molecules

Question # 12

Which is not the affect of polluted air on environment

Question # 13

In incinerating the waste is burnt at

Question # 14

Which of the following is not an air

Question # 15

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

Question # 16

Ecology is a science of environment and deals specially with

Question # 17

Which step is unnecessary for purification of water for drinking purposes

Question # 18

Increased asthmatic attacks in certain seasons are related to

Question # 19

Atmosphere of big/metropolitan cities is polluted most by

Question # 20

Biodegradable pollutant is

Question # 21

DDT is

Question # 22

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 23

A pollutant affects

Question # 24

Acid rain is due to increase in atmospheric concentration of

Question # 25

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

Question # 26

The normal amount of overhead ozone is about

Question # 27

What is the cause of water pollution

Question # 28

Eutrophication causes reduction in

Question # 29

Depletion of ozone layer is due to

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Oceans cove ______ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
2 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
3 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
4 Water pollution is mainly due to
A. Sulphure dioxide
B. Carbon dioxide
C. Oxygen
D. Industrial discharges
5 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
6 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
7 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
8 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
9 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
10 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems

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