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

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

Question # 2

Ozone hole is maximum over

Question # 3

Increasing skin cancer and high mutation rate are due to

Question # 4

Chromium (VI) is highly toxic and can cause

Question # 5

SO2and NO2produce pollution by increasing

Question # 6

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

Question # 7

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

Question # 8

Potable water is considered to be

Question # 9

Eutrophication causes reduction in

Question # 10

The region of earth capable of supporting life is

Question # 11

Depletion of ozone layer is due to

Question # 12

A pollutant affects

Question # 13

Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Question # 14

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

Question # 15

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

Question # 16

Atomospheric pollutant is

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

The amount of Si in the lithosphere is about

Question # 19

Carbon monoxide is pollutant as it

Question # 20

Burning of fossil fuels is the main source of pollution

Question # 21

Chief air pollutant which is likely to deplete ozone layer

Question # 22

Photochemical smog is caused by

Question # 23

Acid rains are produced by

Question # 24

In incinerating the waste is burnt at

Question # 25

Which is not a component of environment

Question # 26

Atmosphere of big/metropolitan cities is polluted most by

Question # 27

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

Question # 28

In the atmosphere, O2is about

Question # 29

Oceans cove ______ percent of the surface of the earth

Question # 30

Which is not a method for solid waste management

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 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
2 Depletion of ozone layer is due to
A. Oxides of nitrogen
B. Oxides of carbon
C. Oxides of sulphur
D. None of the above
3 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
4 Classical smog occurs in palces of
A. Excess SO2
B. Low temperature
C. High temperature
D. Excess NH3
5 The amount of oxygen in the lithosphere is about
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
6 Atmosphere of big/metropolitan cities is polluted most by
A. Automobile exhausts
B. Pesticide residue
C. Household waste
D. Radio-active fall out
7 Shahi Qilla may be destroyed by
A. Flood in Ravi
B. Temperature mediated spoilage of marble
C. Air pollutants from Lahore chemical industries
D. All the above
8 Mottling of teeth is due to presence of an element in drinking water
A. Mercury
B. Fluorine
C. Boron
D. Chlorine
9 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
A. Low value
B. Higher value
C. Both values
D. None of these
10 Chloroflurocarbon releases a chemical harmful to ozone
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie

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