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Chapter 21 is an important part of MDCAT Chemistry that covers polymers and biological macromolecules. It includes the formation and uses of addition polymers like polyethene, polystyrene, and polyvinyl chloride (PVC), as well as condensation polymers such as polyesters (terylene) and polyamides (nylon-6,6). Understanding these topics helps students grasp how small molecules combine to form large, useful materials found in everyday life.
This chapter also explains the structure of proteins , including their primary and secondary structures , and the structure and function of nucleic acids (DNA) , which carry genetic information. By attempting the MDCAT Chemistry Chapter 21 MCQ Test with Answers , students can review key concepts, check their understanding, and strengthen their preparation for the exam.
MCQ's Test For MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test
Try The MCQ's Test For MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test
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Total Questions20
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Time Allowed20
MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test
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Question # 1
Nitrogen percentage in atmosphere is:
Question # 2
Diseases like dysentery, typhoid and hepatitis are caused by mixing of in water:
Question # 3
The normal amount of overhead ozone is
Question # 4
The ozone depletion in the stratophere is mainly due to the reaction of ozone with
Question # 5
A single chloride free radical can destroy the ozone molecules
Question # 6
Chromium (VI) is highly toxic and can cause
Question # 7
Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will not cause water pollution
Question # 8
Augus smith discovered in the mid of seventeenth century:
Question # 9
CFCs are mainly used in industries due to
Question # 10
The normal amount of overhead ozone is about in DU:
Question # 11
Which one of the following is used as coagulant for purification potable water
Question # 12
Water is purified by:
Question # 13
The normal amount of overhead ozone is about
Question # 14
A single chlorine free radical can destory how many ozone molecules
Question # 15
In addition to many pollutants present in ground water, a successful study was conducted to remove a highly Toxic chemical.What chemical is this
Question # 16
The pH range of the acid rain is
Question # 17
Heat balance of earth is maintained by sphere:
Question # 18
Proxy acetyl nitrate (PAN) is an irritant to human beings and it affect
Question # 19
Ozone is most of the tropical regions acts as a pollutant and causes
Question # 20
Amount of ozone in atmosphere is expressed in units:
Prepare Complete Set Wise MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test MCQs Online With Answers
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Set 1
20 Questions
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Set 2
20 Questions
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Set 3
20 Questions
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Set 4
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Set 5
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Set 6
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Set 7
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Set 8
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Set 9
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Set 10
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Set 11
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Set 12
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Set 13
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Set 14
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Set 15
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Set 16
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Set 17
3 Questions
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Top Scorers Of MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test MCQ`s Test
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M Munaza 11 - Oct - 2022 00 Min 07 Sec 20/20 -
L Laiba Khan 24 - Jul - 2022 02 Min 18 Sec 16/20 -
S Sania Abbas 25 - Jul - 2022 06 Min 13 Sec 16/20 -
T tahreem fatima 12 - Nov - 2022 00 Min 04 Sec 15/20 -
F Filza Ahsan 11 - Nov - 2022 01 Min 33 Sec 15/20 -
F Faiz Barvi443 19 - Mar - 2023 03 Min 29 Sec 14/20 -
B Basit Khan 09 - Aug - 2022 06 Min 44 Sec 14/20 -
A Amat Nur 27 - Jun - 2023 07 Min 07 Sec 14/20 -
A Abdullah 11 - Apr - 2023 10 Min 50 Sec 14/20 -
D Dania 01 - Jan - 2023 14 Min 03 Sec 14/20 -
A Ali Ahmed Tauqeer 03 - Mar - 2024 03 Min 27 Sec 13/20 -
A Anaya 07 - Jul - 2023 04 Min 28 Sec 13/20 -
U Urooj Wajid 15 - Sep - 2022 06 Min 47 Sec 13/20 -
M Meer Sadeed 07 - Sep - 2023 10 Min 50 Sec 13/20 -
R Rana Ubaid Chohan 16 - Jul - 2022 10 Min 50 Sec 13/20
MCAT Chemistry Chapter 21 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Ozone in stratosphere extends upto km: |
A. 0-15 km
B. 10-15 km
C. 15-40 km
D. 15-25 km
|
| 2 | The main pollution of leather tanneries in the waste is due to the salt of |
A. Chromium
B. Copper
C. Chromium
D. Lead
|
| 3 | Men residence time of methane in atmosphere in years is: |
A. 1-7
B. 2-7
C. 3-7
D. 4-7
|
| 4 | Part of fresh water consumed in industry is: |
A. 1%
B. 2%
C. 69%
D. 23%
|
| 5 | Exposure to CO results in |
A. Headche
B. Fatigue
C. Unconsciousness
D. All of these
|
| 6 | 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
|
| 7 | Exhaust fumes of cars contain which poisonous gas |
A. CH4
B. C2H6
C. CO
D. All of these
|
| 8 | The layer of gases around the earth are called? |
A. Atmosphere
B. Hydrosphere
C. Lithosphere
D. All of these
|
| 9 | Oceans cove ____________ percent of the surface of the earth |
A. 60
B. 70
C. 80
D. 97
|
| 10 | Potable water is considered to be |
A. Safe for human consumption
B. The ground water
C. The surface water
D. Now safe for human consumption
|
Test Questions