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

Which is not the condition for the formation of smog

Question # 2

Air pollution is not caused by

Question # 3

Depletion of ozone layer is due to

Question # 4

Ultraviolet radiation from sun causes a reaction that produces

Question # 5

Pollution is

Question # 6

Chromium (VI) is highly toxic and can cause

Question # 7

The normal amount of overhead ozone is about

Question # 8

Spraying of DDT produces pollution of

Question # 9

Shahi Qilla may be destroyed by

Question # 10

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

Question # 11

Which one of the following dissolves more rapidly in blood hemoglobin than oxygen?

Question # 12

The amount of Si in the lithosphere is about

Question # 13

Which causes water pollution?

Question # 14

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

Question # 15

Which is not a method for solid waste management

Question # 16

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 # 17

Environmental pollution affects

Question # 18

Ecosystem is a smaller unit of

Question # 19

Which heavy metals do not have any safe limits

Question # 20

Ozone depletion in stratosphere shall result in

Question # 21

Classical smog occurs in palces of

Question # 22

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

Question # 23

Burning of fossil fuels is the main source of pollution

Question # 24

Result of ozone hole is

Question # 25

The % of CO2is the atmosphere is

Question # 26

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 # 27

Which one is not a pollutant normally?

Question # 28

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

Question # 29

Water is often treated with chlorine to

Question # 30

Drawback DDT as presticide is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Ozone in most of the tropical regions acts as a pollutant and causes
A. Damages to eyes
B. Aggravates asthma
C. Chest discomfort
D. All of these
2 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
3 Atomospheric pollutant is
A. CO2
B. CO
C. O2
D. N2
4 Acid rain is due to increase in atmospheric concentration of
A. Ozone and dust
B. CO2and CO
C. SO3and CO
D. SO2and NO2
5 Photochemical smog is caused by
A. CO
B. CO2
C. O3
D. NO2
6 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
7 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
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 Air pollution is not caused by
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
10 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

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