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

Oceans cove ______ percent of the surface of the earth

Question # 2

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

Question # 3

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

Question # 4

Drained sewage has B.O.D

Question # 5

Which one of the following is not air pollutant gas

Question # 6

When chlorofluoro carbon are subjected to U.V. they form

Question # 7

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 8

In purification of potable water the coagulant used is

Question # 9

Atmosphere of big/metropolitan cities is polluted most by

Question # 10

Shahi Qilla may be destroyed by

Question # 11

Which one is not a pollutant normally?

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

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 # 16

In the atmosphere, O2is about

Question # 17

Photochemical smog is caused by

Question # 18

Which is not the affect of polluted air on environment

Question # 19

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

Question # 20

Pick up the correct statement

Question # 21

Fungicides are the pesticides which

Question # 22

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

Question # 23

The % of CO2is the atmosphere is

Question # 24

Ultraviolet radiation from sun causes a reaction that produces

Question # 25

The film forming components of paints are

Question # 26

Which gas is not a constituent of atmosphere

Question # 27

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 # 28

Domestic waste mostly constitutes

Question # 29

Classical smog occurs in palces of

Question # 30

Which one is the major reason for pollution in high cities?

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 The % of CO2is the atmosphere is
A. 3.0%
B. 0.03%
C. 0.3%
D. 0.5%
2 Minamata disease is due to pollution of
A. Organic waste into drinking water
B. Oil spill in water
C. Industrial waste containing mercury into fishing water
D. Arsenic into the atmosphere
3 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
4 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
5 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
6 As it passes into food chain, the concentration of DDT
A. Remains same
B. Decreases
C. Increases
D. Unpredictable
7 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
8 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
9 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
10 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems

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