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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
Drained sewage has B.O.D
Question # 2
Eutrophication causes reduction in
Question # 3
In Antarctica ozone depletion is due to the formation of following compound
Question # 4
Environmental pollution affects
Question # 5
Ozone depletion in stratosphere shall result in
Question # 6
Carbon monoxide is pollutant as it
Question # 7
Ecology is a science of environment and deals specially with
Question # 8
Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called
Question # 9
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 # 10
Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water
Question # 11
Drawback DDT as presticide is
Question # 12
Which is not a method for solid waste management
Question # 13
The % of CO2is the atmosphere is
Question # 14
Exposure to CO results in
Question # 15
SO2and NO2produce pollution by increasing
Question # 16
A single chlorine free radical can destroy how many ozone molecules
Question # 17
Chief air pollutant which is likely to deplete ozone layer
Question # 18
Phosphate pollution is caused by
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
Mottling of teeth is due to presence of an element in drinking water
Question # 21
Which factor is helping to reduce the environmental pollution
Question # 22
Oceans cove ______ percent of the surface of the earth
Question # 23
Increased asthmatic attacks in certain seasons are related to
Question # 24
Most hazardous metal pollutant of automobile exhaust is
Question # 25
Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will bot cause water pollution
Question # 26
Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
Question # 27
When chlorofluoro carbon are subjected to U.V. they form
Question # 28
Which causes water pollution?
Question # 29
The region of earth capable of supporting life is
Question # 30
Domestic waste mostly constitutes
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 Zaman Shehzad 24 - May - 2024 09 Min 53 Sec 95/120 -
M Muhammad Uzair 05 - Jun - 2024 03 Min 33 Sec 90/120 -
A Azeema Siddique Muhammad Siddique 13 - Mar - 2024 04 Min 24 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 | Chromium (VI) is highly toxic and can cause |
A. Blindness
B. Cancer
C. Liver problems
D. Blood problems
|
| 2 | Exposure to CO results in |
A. Headache
B. Fatigue
C. Unconsciousness
D. All of these
|
| 3 | Chief air pollutant which is likely to deplete ozone layer |
A. Sulphure dioxide
B. Carbon dioxide
C. Nitrogen oxides and chloro fluorocarbons
|
| 4 | Air pollution is not caused by |
A. Pollen grains
B. Hydroelectric power
C. Industries
D. Automobiles
|
| 5 | BOD is |
A. Biological oxygen deficit
B. Biosphere oxygen demand
C. Biological oxygen demand
D. None of the above
|
| 6 | Chloroflurocarbon releases a chemical harmful to ozone |
A. Fluorine
B. Chlorine
C. Nitrogen peroxide
D. Sulphure dioxdie
|
| 7 | Minamata disease is due to pollution of |
A. Organic waste into drinking water
B. Oil spill in water
C. Industrial waste containing mercury into fishing water
D. Arsenic into the atmosphere
|
| 8 | Which is not a component of environment |
A. Biosphere
B. Lithospahre
C. Hydrosphere
D. None of these
|
| 9 | Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water |
A. Low value
B. Higher value
C. Both values
D. None of these
|
| 10 | Burning of fossil fuels is the main source of pollution |
A. Nitrogen oxide
B. Nitric oxide
C. Nitrous oxide
D. Sulphur dioxide
|
Test Questions