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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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Total Questions30
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Time Allowed30
ECAT Chemistry Chapter 27 Environmental Chemistry
00:00
Question # 1
Industrial effuents have toxic synthetic organic compounds as well as heavy metals like
Question # 2
Water is often treated with chlorine to
Question # 3
Chlorofluorocarbon, CF2CI2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
Question # 4
In water the most important oxidizing agent is dissolved molecular oxygen which ranges from
Question # 5
Ultraviolet radiation from sun causes a reaction that produces
Question # 6
Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
Question # 7
The amount of Si in the lithosphere is about
Question # 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
Question # 9
Environmental pollution affects
Question # 10
Most hazardous metal pollutant of automobile exhaust is
Question # 11
The normal amount of overhead ozone is about
Question # 12
When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
Question # 13
CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
Question # 14
Which is not a component of environment
Question # 15
Carbon monoxide is harmful to human beings as it
Question # 16
In the atmosphere, CO2is about
Question # 17
The % of CO2is the atmosphere is
Question # 18
Chromium (VI) is highly toxic and can cause
Question # 19
Domestic waste mostly constitutes
Question # 20
Chromium (VI) is highly toxic and can cause
Question # 21
Sulphur dioxide affects
Question # 22
Classical smog occurs in palces of
Question # 23
UV radiations bring about
Question # 24
Result of ozone hole is
Question # 25
Which of the following human activities are contaminating surface and ground waters
Question # 26
Ozone hole is maximum over
Question # 27
Which causes water pollution?
Question # 28
SO2and NO2produce pollution by increasing
Question # 29
Shahi Qilla may be destroyed by
Question # 30
The region of earth capable of supporting life is
Top Scorers Of ECAT Chemistry Chapter 27 Environmental Chemistry MCQ`s Test
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F Farzand Shah Farzand Shah 10 - Apr - 2024 03 Min 00 Sec 120/120 -
T Tanzeel Ur Rehman 28 - May - 2024 04 Min 15 Sec 115/120 -
M M Umer Arain 24 - Dec - 2024 00 Min 04 Sec 110/120 -
A Alyna Fatima 25 - Mar - 2024 03 Min 12 Sec 110/120 -
S Sarosh Amjad 21 - Jan - 2025 03 Min 44 Sec 110/120 -
A Abid Ali 19 - May - 2024 10 Min 33 Sec 110/120 -
A Alyna Fatima 25 - Mar - 2024 03 Min 28 Sec 105/120 -
Z Zainab Tahira 14 - Jun - 2026 03 Min 29 Sec 104/120 -
Z Zaman Shehzad 24 - May - 2024 09 Min 53 Sec 95/120 -
M Muhammad Uzair 05 - Jun - 2024 03 Min 33 Sec 90/120 -
Z Zargaii 92 29 - May - 2024 06 Min 59 Sec 90/120 -
C Cricket Expert's 27 - May - 2024 03 Min 01 Sec 85/120 -
M Muhammad Saleem 06 - Dec - 2024 13 Min 11 Sec 85/120 -
T tayyab ali 20 - May - 2024 19 Min 22 Sec 80/120 -
C Computer mail 10 - Feb - 2026 07 Min 01 Sec 76/120
ECAT Chemistry Chapter 27 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Water which his considered to be safe for human consumption is known as |
A. Distilled water
B. Contaminated water
C. Potable water
D. Rain water
|
| 2 | Which gasses are produced from landfills |
A. NH3
B. H2S
C. N2
D. All of these
|
| 3 | Phosphate pollution is caused by |
A. Weathering of phosphate rocks only
B. Agricultural fertilizers
C. Phosphate rocks and sewage
D. Sewage and agricultural fertilizers
|
| 4 | 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
|
| 5 | 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
|
| 6 | Which gas is not a constituent of atmosphere |
A. Xe
B. O3
C. H2
D. F2
|
| 7 | The toxic organic compounds and heavy metals and metalloids results in contamination of |
A. Surface water
B. Ground water
C. Both surface and ground water
D. Neither surface nor ground waters
|
| 8 | Carbon monoxide is harmful to human beings as it |
A. Is carcinogenic
B. Is antagonistic to CO2
C. Has higher affinity for hemoglobin as compared to oxygen
D. Is destructive to O3
|
| 9 | Fungicides are the pesticides which |
A. Control the growth of fungus
B. Kill insects
C. Kill plants
D. Kill herbs
|
| 10 | The amount of oxygen in the lithosphere is about |
A. 35.50%
B. 40.60%
C. 56.60%
D. 50.50%
|
Test Questions
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