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

B.O.D is connected with

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

Depletion of ozone layer is due to

Question # 6

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

Question # 7

Chromium (VI) is highly toxic and can cause

Question # 8

Industrial effuents have toxic synthetic organic compounds as well as heavy metals like

Question # 9

Biodegradable pollutant is

Question # 10

Drained sewage has B.O.D

Question # 11

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

Question # 12

In incinerating the waste is burnt at

Question # 13

Sulphur dioxide affects

Question # 14

Atmosphere of big/metropolitan cities is polluted most by

Question # 15

Which is not a method for solid waste management

Question # 16

Fungicides are the pesticides which

Question # 17

BOD is

Question # 18

Water pollution is mainly due to

Question # 19

Soil remediation means

Question # 20

Ecology is a science of environment and deals specially with

Question # 21

Shahi Qilla may be destroyed by

Question # 22

Cyclone collector is used for minimizing

Question # 23

In Antarctica ozone depletion is due to the formation of following compound

Question # 24

Ecosystem is a smaller unit of

Question # 25

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

Question # 26

When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Question # 27

Which of the following is not an air

Question # 28

The largest item which is recycled is

Question # 29

In purification of potable water the coagulant used is

Question # 30

Eutrophication causes reduction in

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ECAT Chemistry Chapter 27 Important MCQ's

Sr.# Question Answer
1 Burning of fossil fuels is the main source of pollution
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
2 Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
A. SO2
B. NO2
C. CO
D. A and b only
3 Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
A. Fullerences
B. Freons
C. Polyhalogens
D. Ferrocene
4 BOD is
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
5 Most hazardous metal pollutant of automobile exhaust is
A. Mercury
B. Lead
C. Cadmium
D. Copper
6 Result of ozone hole is
A. Green house effect
B. Global warming
C. Acid rain
D. UV rays reach the earth
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 The pH of the rain water in areas where acid rain is the cause of pollution may be
A. 6.5
B. 5.6
C. 4.5
D. 2.2
9 Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
10 Drawback DDT as presticide is
A. I becomes ineffective after some time
B. It is less effective than others
C. It is not easily/rapidly degraded in nature
D. Its high cost

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