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

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

Question # 2

In incinerating the waste is burnt at

Question # 3

Spraying of DDT produces pollution of

Question # 4

Which factor is helping to reduce the environmental pollution

Question # 5

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

Question # 6

Increased asthmatic attacks in certain seasons are related to

Question # 7

Swage water is purified by

Question # 8

Which heavy metals do not have any safe limits

Question # 9

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

Question # 10

Carbon monoxide is harmful to human beings as it

Question # 11

Drained sewage has B.O.D

Question # 12

A pollutant affects

Question # 13

SO2Makes ______ acid rains

Question # 14

Depletion of ozone layer is due to

Question # 15

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 # 16

Acid rain is due to increase in atmospheric concentration of

Question # 17

Polycyolic aromatic hydrocarbons are taught to be

Question # 18

Potable water is considered to be

Question # 19

The film forming components of paints are

Question # 20

Increasing skin cancer and high mutation rate are due to

Question # 21

Water is often treated with chlorine to

Question # 22

Ozone depletion in stratosphere shall result in

Question # 23

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

Question # 24

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

Question # 25

Ecosystem is a smaller unit of

Question # 26

The amount of oxygen in the lithosphere is about

Question # 27

Eutrophication causes reduction in

Question # 28

Classical smog occurs in palces of

Question # 29

Atmosphere of big/metropolitan cities is polluted most by

Question # 30

B.O.D is connected with

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Ecosystem is a smaller unit of
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
2 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
3 Drained sewage has B.O.D
A. More than that of water
B. Less than that of water
C. Equal to that of water
D. None of the above
4 Acid rains are produced by
A. Excess NO2and SO2 from burining fossil fuels
B. Excess production of NH3by industry and coal gas
C. Excess release of carbon monoxide by incomplete combustion
D. Excess formation of CO2by combustion and animal respiration
5 Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
6 Ozone hole is maximum over
A. Europe
B. Antarctica
C. Asia
D. Africa
7 DDT is
A. Biodegradable pollutant
B. Nondegradable pollutant
C. Not a pollutant
D. An antibiotic
8 CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
A. 10,000
B. 20,000
C. 100,000
D. 50,000
9 The amount of Si in the lithosphere is about
A. 27.72%
B. 30.35%
C. 35.30%
D. 40.21%
10 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

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