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

Increased asthmatic attacks in certain seasons are related to

Question # 2

The pH range of the acid rain is

Question # 3

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

Question # 4

In the atmosphere, CO2is about

Question # 5

Water is often treated with chlorine to

Question # 6

In purification of potable water the coagulant used is

Question # 7

Chief air pollutant which is likely to deplete ozone layer

Question # 8

Ozone hole is maximum over

Question # 9

In incinerating the waste is burnt at

Question # 10

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution

Question # 11

SO2and NO2produce pollution by increasing

Question # 12

SO2Makes ______ acid rains

Question # 13

The toxic organic compounds and heavy metals and metalloids results in contamination of

Question # 14

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

Question # 15

Pollution is

Question # 16

Shahi Qilla may be destroyed by

Question # 17

Most hazardous metal pollutant of automobile exhaust is

Question # 18

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

Question # 19

Soil salinity can be measured by

Question # 20

Carbon monoxide is harmful to human beings as it

Question # 21

Ozone hole refers to

Question # 22

Increasing skin cancer and high mutation rate are due to

Question # 23

Which gasses are produced from landfills

Question # 24

The 95.5% mass of Lithosphone is made of 11 elements i.e. O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. which element is present in trace amount

Question # 25

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

Question # 26

Atmosphere of big/metropolitan cities is polluted most by

Question # 27

Ecology is a science of environment and deals specially with

Question # 28

UV radiations bring about

Question # 29

Phosphate pollution is caused by

Question # 30

Which is not the affect of polluted air on environment

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Which one is the major reason for pollution in high cities?
A. Fossil fuel
B. Acid rain
C. Heat dispersion
D. None of the above
2 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
3 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
4 Carbon monoxide is harmful to human beings as it
A. Is carcinogenic
B. Is antagonistic to CO2
C. Has higher affinity for hemoglobin as compared to oxygen
D. Is destructive to O3
5 Biodegradable pollutant is
A. Plastic
B. Asbestos
C. Sewage
D. Mercury
6 Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
A. Pb
B. Cr
C. Hg
D. All of these
7 Pollutant of automobile exhausts that affects nervous system/produces mental diseases is
A. Mercury
B. Lead
C. Nitrogen oxide
D. Sulphuric oxide
8 Ozone hole refers to
A. Hole in ozone layers
B. Reduction in thickness of ozone layer in stratosphere
C. Reduction of thickness of ozone in troposphere
D. Increase concentration of ozone
9 Chromium (VI) is highly toxic and can cause
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
10 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

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