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

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

Question # 2

The % of CO2is the atmosphere is

Question # 3

Most hazardous metal pollutant of automobile exhaust is

Question # 4

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

Question # 5

SO2Makes ______ acid rains

Question # 6

Acid rain is due to increase in atmospheric concentration of

Question # 7

Oceans cove ______ percent of the surface of the earth

Question # 8

Atmosphere of big/metropolitan cities is polluted most by

Question # 9

In purification of potable water the coagulant used is

Question # 10

Which one is not a pollutant normally?

Question # 11

Shahi Qilla may be destroyed by

Question # 12

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

Question # 13

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

Question # 14

Acid rains are produced by

Question # 15

Increased asthmatic attacks in certain seasons are related to

Question # 16

Chloroflurocarbon releases a chemical harmful to ozone

Question # 17

Which gas is not a constituent of atmosphere

Question # 18

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

Question # 19

In the atmosphere, CO2is about

Question # 20

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

Question # 21

Biodegradable pollutant is

Question # 22

Ultraviolet radiation from sun causes a reaction that produces

Question # 23

Soil salinity can be measured by

Question # 24

Which one is the most toxic?

Question # 25

Which is not the condition for the formation of smog

Question # 26

What is the cause of water pollution

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

The pH range of the acid rain is

Question # 29

Increasing skin cancer and high mutation rate are due to

Question # 30

Water is often treated with chlorine to

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Carbon monoxide is harmful to human beings as it
A. Is carcinogenic
B. Is antagonistic to CO2
C. Has higher affinity for hemoglobin as compared to oxygen
D. Is destructive to O3
2 Potable water is considered to be
A. Safe for human consumption
B. Not safe for human consumption
C. The surface water
D. The ground water
3 Phosphate pollution is caused by
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers
4 To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be
A. Ag+
B. Cu2+
C. Al3+
D. Si4+
5 Which of the following human activities are contaminating surface and ground waters
A. Pesticides
B. Septic tanks
C. Petroleum and natural gas production
D. All of these
6 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above
7 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
8 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
9 Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called
A. Primary pollutant
B. Secondary pollutant
C. Tertiary pollutant
D. None of these
10 In purification of potable water the coagulant used is
A. Nickle sulpahte
B. Copper sulpahte
C. Barium sulpahte
D. Alum

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