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

Shahi Qilla may be destroyed by

Question # 2

Polycyolic aromatic hydrocarbons are taught to be

Question # 3

SO2Makes ______ acid rains

Question # 4

Ozone depletion in stratosphere shall result in

Question # 5

Water is often treated with chlorine to

Question # 6

Which one of the following is not air pollutant gas

Question # 7

Ultraviolet radiation from sun causes a reaction that produces

Question # 8

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

Question # 9

The normal amount of overhead ozone is about

Question # 10

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

Question # 11

In the atmosphere, O2is about

Question # 12

Acid rain is due to increase in atmospheric concentration of

Question # 13

The largest item which is recycled is

Question # 14

Which is not the affect of polluted air on environment

Question # 15

Atomospheric pollutant is

Question # 16

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

Question # 17

Eutrophication causes reduction in

Question # 18

Atmosphere of big/metropolitan cities is polluted most by

Question # 19

The % of CO2is the atmosphere is

Question # 20

Result of ozone hole is

Question # 21

Oceans cove ______ percent of the surface of the earth

Question # 22

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

Question # 23

BOD is

Question # 24

Which of the following is not an air

Question # 25

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

Question # 26

Which causes water pollution?

Question # 27

Which gas is not a constituent of atmosphere

Question # 28

Ecosystem is a smaller unit of

Question # 29

Which is not a method for solid waste management

Question # 30

Most hazardous metal pollutant of automobile exhaust is

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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 Increased asthmatic attacks in certain seasons are related to
A. Inhalation of seasonal pollen
B. Eating of seasonal vegetables
C. Low temperature
D. Wet and dry environment
3 Eutrophication causes reduction in
A. Dissolved hydrogen
B. Dissolved oxygen
C. Dissolved salts
D. All the above
4 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
5 When chlorofluoro carbon are subjected to U.V. they form
A. Cations
B. Anions
C. Free radicals
D. None of these
6 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
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having flouring trapped in it
D. Use a sorbent having Al2O3trapped in it
7 Water is often treated with chlorine to
A. Increase oxygen content
B. Kill germs
C. Remove hardness
D. Remove suspended particles
8 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
A. Live stock waste
B. Oil leaks and spills
C. Disposal of industrial effluents
D. Rain
9 When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
A. Uninfluenced by occurrence of thuderstorm
B. Which depends on the amount of dust in air
C. Slightly lower than that of rain water without thunderstorm
D. Slighlty higher than that when the thunderstom is not there
10 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these

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