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

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

Question # 2

Which step is unnecessary for purification of water for drinking purposes

Question # 3

Eutrophication causes reduction in

Question # 4

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

Question # 5

Classical smog occurs in palces of

Question # 6

Fungicides are the pesticides which

Question # 7

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 # 8

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

Question # 9

Which factor is helping to reduce the environmental pollution

Question # 10

Depletion of ozone layer is due to

Question # 11

The region of earth capable of supporting life is

Question # 12

Ecology is a science of environment and deals specially with

Question # 13

Sulphur dioxide affects

Question # 14

A pollutant affects

Question # 15

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

Question # 16

BOD is

Question # 17

Increased asthmatic attacks in certain seasons are related to

Question # 18

Ecosystem is a smaller unit of

Question # 19

In incinerating the waste is burnt at

Question # 20

Chief source of water and soil pollution is

Question # 21

Ozone depletion in stratosphere shall result in

Question # 22

Ozone hole refers to

Question # 23

Chromium (VI) is highly toxic and can cause

Question # 24

Most hazardous metal pollutant of automobile exhaust is

Question # 25

UV radiations bring about

Question # 26

Chief air pollutant which is likely to deplete ozone layer

Question # 27

Photochemical smog is caused by

Question # 28

Ozone layer of stratosphere requires protection from indiscriminate use of

Question # 29

Result of ozone hole is

Question # 30

SO2Makes ______ acid rains

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
A. Environment
B. Hydrosphere
C. Pollutant
D. Biosphere
2 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
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having flouring trapped in it
D. Use a sorbent having Al2O3trapped in it
3 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane
4 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
5 NO and NO2gases in atmosphere are represented by
A. NO
B. NO4
C. NOx
D. NxOy
6 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
7 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
8 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
9 Increased asthmatic attacks in certain seasons are related to
A. Inhalation of seasonal pollen
B. Eating of seasonal vegetables
C. Low temperature
D. Wet and dry environment
10 Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due
A. Combining with oxygen to form carbon dioxide
B. Destruction of hemoglobin
C. Preventing reaction between oxygen and hemoglobin
D. Forming stable compound with hemoglobin

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