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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  • Time Allowed30

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ECAT Chemistry Chapter 27 Environmental Chemistry

00:00
Question # 1

In the atmosphere, CO2is about

Question # 2

Carbon monoxide is harmful to human beings as it

Question # 3

Eutrophication causes reduction in

Question # 4

Increased asthmatic attacks in certain seasons are related to

Question # 5

Carbon monoxide, emitted by automobiles, prevents transport of oxygen in body due

Question # 6

Ozone depletion in stratosphere shall result in

Question # 7

Fungicides are the pesticides which

Question # 8

Chloroflurocarbon releases a chemical harmful to ozone

Question # 9

Chief air pollutant which is likely to deplete ozone layer

Question # 10

SO2Makes ______ acid rains

Question # 11

Carbon monoxide is pollutant as it

Question # 12

Which heavy metals do not have any safe limits

Question # 13

As it passes into food chain, the concentration of DDT

Question # 14

Which causes water pollution?

Question # 15

Photochemical smog is caused by

Question # 16

Which is not the affect of polluted air on environment

Question # 17

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

Question # 18

Which step is unnecessary for purification of water for drinking purposes

Question # 19

The pH range of the acid rain is

Question # 20

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

Question # 21

Water pollution is mainly due to

Question # 22

Soil salinity can be measured by

Question # 23

Which is not a component of environment

Question # 24

The normal amount of overhead ozone is about

Question # 25

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 # 26

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 27

The film forming components of paints are

Question # 28

Which is not the condition for the formation of smog

Question # 29

Classical smog occurs in palces of

Question # 30

The largest item which is recycled is

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
2 Pollution is
A. Removal of top soill
B. Release of toxic/undesirable materials in enevironment
C. Conversation of energy
D. All the above
3 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
4 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
5 Ultraviolet radiation from sun causes a reaction that produces
A. Fluorides
B. Carbon monoxide
C. Sulphur dioxide
D. Ozone
6 Ozone layer of stratosphere requires protection from indiscriminate use of
A. Fungicides, insecticides, bactericides and medicines
B. Aerosols and high flying jets
C. Atomic explosions and industrial wastes
D. Baloons and turbo-prop aeroplanes
7 Polycyolic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
8 Pick up the correct statement
A. CO which is major pollutant resulting from the combustion of fuels in automobile plays a major role in photochemical smog
B. Classical smog has an oxidizing character while the phtochemical smog is reducing in character
C. Photochemical smog occurs in day time whereas the classical smog occurs in early morning hours
D. During formation of smog the level of ozone in the atmosphere goes down
9 Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
A. Fullerences
B. Freons
C. Polyhalogens
D. Ferrocene
10 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

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