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

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

Question # 2

The film forming components of paints are

Question # 3

The largest item which is recycled is

Question # 4

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

Question # 5

SO2and NO2produce pollution by increasing

Question # 6

Soil salinity can be measured by

Question # 7

Chloroflurocarbon releases a chemical harmful to ozone

Question # 8

Ultraviolet radiation from sun causes a reaction that produces

Question # 9

Atomospheric pollutant is

Question # 10

Polycyolic aromatic hydrocarbons are taught to be

Question # 11

The amount of oxygen in the lithosphere is about

Question # 12

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

Question # 13

Photochemical smog is caused by

Question # 14

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

Question # 15

Acid rain is due to increase in atmospheric concentration of

Question # 16

The % of CO2is the atmosphere is

Question # 17

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

Question # 18

DDT is

Question # 19

To purify water which has mud dissolved in it, A substance which coagulates the suspended particles is used. The coagulant may be

Question # 20

Which of the following is not an air

Question # 21

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

Question # 22

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

Question # 23

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 # 24

Most hazardous metal pollutant of automobile exhaust is

Question # 25

Air pollution is not caused by

Question # 26

Spraying of DDT produces pollution of

Question # 27

Drawback DDT as presticide is

Question # 28

Depletion of ozone layer is due to

Question # 29

Chromium (VI) is highly toxic and can cause

Question # 30

Which gasses are produced from landfills

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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 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
3 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
4 Increasing skin cancer and high mutation rate are due to
A. Acid rain
B. Ozone depletion
C. CO pollution
D. CO2Pollution
5 The region of earth capable of supporting life is
A. Hydrosphere
B. Lithosphere
C. Biosphere
D. Atmosphere
6 Ozone hole is maximum over
A. Europe
B. Antarctica
C. Asia
D. Africa
7 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
8 In the atmosphere, CO2is about
A. 0.01%
B. 0.03%
C. 0.05%
D. 0.09%
9 A single chlorine free radical can destroy how many ozone molecules
A. 100
B. 100000
C. 10000
D. 10
10 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

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