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

Domestic waste mostly constitutes

Question # 2

Biodegradable pollutant is

Question # 3

Photochemical smog is caused by

Question # 4

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

Question # 5

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

Question # 6

Fungicides are the pesticides which

Question # 7

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 # 8

Increased asthmatic attacks in certain seasons are related to

Question # 9

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

Question # 10

The largest item which is recycled is

Question # 11

Ozone in most of the tropical regions acts as a pollutant and causes

Question # 12

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

Question # 13

The film forming components of paints are

Question # 14

BOD is

Question # 15

Which causes water pollution?

Question # 16

Chloroflurocarbon releases a chemical harmful to ozone

Question # 17

Which is not a component of environment

Question # 18

Pollution is

Question # 19

Swage water is purified by

Question # 20

The normal amount of overhead ozone is about

Question # 21

In incinerating the waste is burnt at

Question # 22

Chief source of water and soil pollution is

Question # 23

Depletion of ozone layer is due to

Question # 24

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

Question # 25

Oceans cove ______ percent of the surface of the earth

Question # 26

Atmosphere of big/metropolitan cities is polluted most by

Question # 27

In the atmosphere, O2is about

Question # 28

Shahi Qilla may be destroyed by

Question # 29

The % of CO2is the atmosphere is

Question # 30

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

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
2 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
3 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
4 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
5 Which factor is helping to reduce the environmental pollution
A. Rapid growth of population
B. Urbanization
C. Industrialization
D. Increase of plantation
6 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
7 The toxic organic compounds and heavy metals and metalloids results in contamination of
A. Surface water
B. Ground water
C. Both surface and ground water
D. Neither surface nor ground waters
8 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
9 Ecology is a science of environment and deals specially with
A. Stratosphere
B. Biosphere
C. Lithosphere
D. Hydrosphere
10 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine

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