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

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Question # 1

Chief air pollutant which is likely to deplete ozone layer

Question # 2

The normal amount of overhead ozone is about

Question # 3

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

Question # 4

Sulphur dioxide affects

Question # 5

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

Question # 6

In purification of potable water the coagulant used is

Question # 7

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

Question # 8

Chief source of water and soil pollution is

Question # 9

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

Question # 10

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 # 11

Which causes water pollution?

Question # 12

SO2and NO2produce pollution by increasing

Question # 13

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 # 14

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 # 15

What is the cause of water pollution

Question # 16

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

Question # 17

Water is often treated with chlorine to

Question # 18

Photochemical smog is caused by

Question # 19

Acid rains are produced by

Question # 20

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

Question # 21

Biodegradable pollutant is

Question # 22

Phosphate pollution is caused by

Question # 23

Chloroflurocarbon releases a chemical harmful to ozone

Question # 24

Fungicides are the pesticides which

Question # 25

Increased asthmatic attacks in certain seasons are related to

Question # 26

SO2Makes ______ acid rains

Question # 27

Soil salinity can be measured by

Question # 28

Pick up the correct statement

Question # 29

Most hazardous metal pollutant of automobile exhaust is

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Chief air pollutant which is likely to deplete ozone layer
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
2 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
3 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
4 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
5 Drained sewage has B.O.D
A. More than that of water
B. Less than that of water
C. Equal to that of water
D. None of the above
6 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
7 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
A. SO2
B. NO2
C. CO
D. A and b only
8 Ultraviolet radiation from sun causes a reaction that produces
A. Fluorides
B. Carbon monoxide
C. Sulphur dioxide
D. Ozone
9 Which one is the most toxic?
A. Carbon
B. CO
C. CO2
D. SO2
10 SO2and NO2produce pollution by increasing
A. Alkalinity
B. Acidity
C. Neutrality
D. Buffer action

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