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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
Hydrosphere includes
Question # 2
Water which his considered to be safe for human consumption is known as
Question # 3
Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
Question # 4
Transformation is a cyclic process in which used plactic is
Question # 5
White marble buildings are effected by?
Question # 6
Coal contains percentage of sulphur:
Question # 7
The gases in the atmosphere are essential for sustaining life on earth. Thus oxygen is required for breathing. What for is carbon dioxide required
Question # 8
Temporary hardness can be removed by adding
Question # 9
A single chloride free redical can destroy bow many ozene molecules?
Question # 10
The force which hold the atoms together to form a compound is called:
Question # 11
What is component of environment?
Question # 12
Agriculture consumes part of fresh water:
Question # 13
A pollutant affects
Question # 14
Which factor is helping to reduce the environmental pollution
Question # 15
Natural water is
Question # 16
In incinerating the waste is burnt at
Question # 17
Ozone layer is high:
Question # 18
SO2and NO2cause pollution due to increase in
Question # 19
A single chlorine free radical can destroy how many ozone molecules
Question # 20
As the number of carbon atoms increase the number of isomers also increase. The six carbon compound hexane has as many as:
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 -
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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 | Residence time of methane in the atmosphere is |
A. 3 - 7 days
B. 2 -3 days
C. 3 - 7 years
D. 2 - 3 years
|
| 2 | Oxides of sulphur react in atmosphere by various reactions to form: |
A. sulphates
B. sulphites
C. sulphides
D. sulphate aerosols
|
| 3 | Which is not considered as pollutant |
A. O3
B. CO2
C. NO2
D. SO2
|
| 4 | Out of total amount of water available for human use is |
A. 0.30%
B. 0.2%
C. 40%
D. 50%
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| 5 | In Purification of potable water the coagulant used is |
A. nickel sulpahte
B. copper sulpahte
C. barium sulphate
D. alum
|
| 6 | The normal amount of overhead ozone is about in DU: |
A. 150
B. 250
C. 350
D. 450
|
| 7 | Chemical like Al2(SO4) or alum are used in purification of water druing step: |
A. aeration
B. coagulation
C. chlorination
D. treatment
|
| 8 | For incineration temperature range is (in oC) |
A. 700-800
B. 800-900
C. 900-1000
D. 1000-1100
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| 9 | Oceans cove ____________ percent of the surface of the earth |
A. 60
B. 70
C. 80
D. 97
|
| 10 | Half of the mass of atmosphere is concentrated above earth at the hieght of |
A. 40 Km
B. 25-28 Km
C. 5-6 Km
D. 100 Km
|
Test Questions