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

The normal amount of overhead ozone is about

Question # 2

Which one is the most toxic?

Question # 3

Carbon monoxide is harmful to human beings as it

Question # 4

Chief air pollutant which is likely to deplete ozone layer

Question # 5

Increased asthmatic attacks in certain seasons are related to

Question # 6

Oceans cove ______ percent of the surface of the earth

Question # 7

Potable water is considered to be

Question # 8

Chromium (VI) is highly toxic and can cause

Question # 9

As it passes into food chain, the concentration of DDT

Question # 10

NO and NO2gases in atmosphere are represented by

Question # 11

Shahi Qilla may be destroyed by

Question # 12

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

Question # 13

Ozone depletion in stratosphere shall result in

Question # 14

Drawback DDT as presticide is

Question # 15

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

Question # 16

Soil salinity can be measured by

Question # 17

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 # 18

BOD is

Question # 19

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

Question # 20

Acid rains are produced by

Question # 21

Water which his considered to be safe for human consumption is known as

Question # 22

Fungicides are the pesticides which

Question # 23

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

Question # 24

Ozone hole is maximum over

Question # 25

The region of earth capable of supporting life is

Question # 26

UV radiations bring about

Question # 27

B.O.D is connected with

Question # 28

The largest item which is recycled is

Question # 29

Environmental pollution affects

Question # 30

Which gas is not a constituent of atmosphere

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
2 Which gas is not a constituent of atmosphere
A. Xe
B. O3
C. H2
D. F2
3 Which one is not a pollutant normally?
A. Hydrocarbons
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
4 Which of the following forms a toxic substance in blood by combing with hemoglobin?
A. Carbon dioxide
B. Carbon monoxide
C. Oxygen
D. Methane
5 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
6 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
7 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
8 The film forming components of paints are
A. Resins
B. Thinners
C. Pigments
D. Driers
9 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
10 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie

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