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

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 3

The film forming components of paints are

Question # 4

Environmental pollution affects

Question # 5

Result of ozone hole is

Question # 6

Which one is the most toxic?

Question # 7

Which step is unnecessary for purification of water for drinking purposes

Question # 8

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

Question # 9

Ecology is a science of environment and deals specially with

Question # 10

Chromium (VI) is highly toxic and can cause

Question # 11

Which of the following is not an air

Question # 12

In Antarctica ozone depletion is due to the formation of following compound

Question # 13

Phosphate pollution is caused by

Question # 14

Soil remediation means

Question # 15

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

Question # 16

The amount of Si in the lithosphere is about

Question # 17

Ozone hole is maximum over

Question # 18

Exposure to CO results in

Question # 19

Spraying of DDT produces pollution of

Question # 20

Oceans cove ______ percent of the surface of the earth

Question # 21

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

Question # 22

Which of the following waste material is not recycled for use again

Question # 23

Swage water is purified by

Question # 24

B.O.D is connected with

Question # 25

Fungicides are the pesticides which

Question # 26

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

Question # 27

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Question # 28

Chief source of water and soil pollution is

Question # 29

Which of the following forms a toxic substance in blood by combing with hemoglobin?

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 A pollutant affects
A. Human health
B. Quality of life
C. Functioning of ecosystem
D. All of these
2 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
3 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
4 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
5 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
6 Environmental pollution affects
A. Biotic components
B. Plants only
C. Man only
D. Biotic and abiotic components of environment
7 Phosphate pollution is caused by
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers
8 Shahi Qilla may be destroyed by
A. Flood in Ravi
B. Temperature mediated spoilage of marble
C. Air pollutants from Lahore chemical industries
D. All the above
9 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
10 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

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