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

In incinerating the waste is burnt at

Question # 2

Phosphate pollution is caused by

Question # 3

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

Question # 4

The amount of Si in the lithosphere is about

Question # 5

Which factor is helping to reduce the environmental pollution

Question # 6

Carbon monoxide is pollutant as it

Question # 7

Result of ozone hole is

Question # 8

Which step is unnecessary for purification of water for drinking purposes

Question # 9

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 # 10

Ultraviolet radiation from sun causes a reaction that produces

Question # 11

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 # 12

In the atmosphere, CO2is about

Question # 13

Minamata disease is due to pollution of

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

Which causes water pollution?

Question # 18

SO2and NO2produce pollution by increasing

Question # 19

Which of the following human activities are contaminating surface and ground waters

Question # 20

Classical smog occurs in palces of

Question # 21

Water is often treated with chlorine to

Question # 22

Drawback DDT as presticide is

Question # 23

The region of earth capable of supporting life is

Question # 24

Shahi Qilla may be destroyed by

Question # 25

DDT is

Question # 26

Which one is the most toxic?

Question # 27

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

Question # 28

Increased asthmatic attacks in certain seasons are related to

Question # 29

Chloroflurocarbon releases a chemical harmful to ozone

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which causes water pollution?
A. Smoke/fly ash
B. Automobile exhausts
C. Aeroplnes
D. 2,4-D and pesticides
2 What is the cause of water pollution
A. Chemical and bacterial contents in live stock
B. The spilled oil in rivers and ponds
C. Wide spread use of pesticides
D. All of the above
3 Carbon monoxide is pollutant as it
A. Inactivates nerves
B. Inhibits glycolysis
C. Combines with oxygen
D. Combines with hemoglobin
4 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
5 Phosphate pollution is caused by
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers
6 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
7 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
8 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost
9 UV radiations bring about
A. Skin cancer
B. Mouth cancer
C. Lung cancer
D. Liver cancer
10 Exposure to CO results in
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these

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