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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
Which of the following factors is not used to determine the quality of water
Question # 2
alum or aluminium sulphate used as coagulant in alkaline medium change into precipitate of radicals of alumimium.
Question # 3
The smog having high contents of SO2is
Question # 4
Addition of washing soda removes
Question # 5
The pH rain of acid rain is
Question # 6
Hardness which can be removed by boiling is called
Question # 7
Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen
Question # 8
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 # 9
Ecosystem is a smaller unity of
Question # 10
Ozone is an allotropic form of:
Question # 11
Lead pollution is mainly due to
Question # 12
In purification of potable water the coagulant used is:
Question # 13
Pathogens in raw water are killed in step:
Question # 14
In water the most important oxidizing agent is dissolved molecular oxygen which ranges form
Question # 15
Oceans cove ____________ percent of the surface of the earth
Question # 16
How much quantity of total water is available as fresh water
Question # 17
Which of the following substance is not present in acid rain?
Question # 18
Heat balance of earth is maintained by
Question # 19
The bonding occurs among polar covalent molecules containing H and one of the small electronegative element such as O,F or N is called:
Question # 20
Contamination of water of tanning industries is due to:
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 -
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D Dania 01 - Jan - 2023 14 Min 03 Sec 14/20 -
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MCAT Chemistry Chapter 21 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Men residence time of methane in atmosphere in years is: |
A. 1-7
B. 2-7
C. 3-7
D. 4-7
|
| 2 | Which gases are produced from landfills? |
A. NH3
B. H2S
C. N2
D. All of these
|
| 3 | Which of the following air pollutant is called quiet killer |
A. PAN
B. CO
C. NO3
D. SO3
|
| 4 | The normal amount of overhead ozone is |
A. 350 DU
B. 450 DU
C. 400 DU
D. 300 DU
|
| 5 | White marble buildings are effected by? |
A. O2
B. SO2
C. CI2
D. CFCs
|
| 6 | Ozone acts as: |
A. Pollutant
B. saver
C. oxidatant
D. All of these
|
| 7 | Transformation is a cyclic process in which used plactic is |
A. Remelted and styrene is added
B. Converted into low quality substance
C. Converted back into original components
D. None of these
|
| 8 | Which of the following substance is not present in acid rain? |
A. Sulphuric acid
B. Nitric acid
C. Sulphurous acid
D. Acetic acid
|
| 9 | Industrial effluents have toxic synthetic organic compounds as well as heavy metals like |
A. Pb
B. Cr
C. Hg
D. All of these
|
| 10 | Polar ice caps can melt due to |
A. Acid rain
B. Green House Effect
C. Smog
D. Chlorofluorocarbons
|
Test Questions