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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
CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy
Question # 2
Which of the following is a macronutrient?
Question # 3
A chemist says that glass must be a super cooled liquid. the reason that he might have in his mind is that glass has:
Question # 4
Commonly used coagulants are ions of:
Question # 5
Water is considered pollutant when value of Do is
Question # 6
In the atmosphere, O2is about
Question # 7
Ozone gas has boiling point:
Question # 8
The layer of earth around the earth is called:
Question # 9
Newspapers can be recycled again and again by how many times
Question # 10
How many times a newspaper can be recycled
Question # 11
Natural water is
Question # 12
Which one of the following is not air pollutant gas
Question # 13
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 # 14
Addition of washing soda removes
Question # 15
Water is made disinfectant during purification of water to the step:
Question # 16
Biochemical oxygen demand (BOD) is the capacity of organic matter in natural water to consume oxygen with in a period of
Question # 17
The overall effect of the photochemical smog in the after noon is built up of
Question # 18
Term ozone hole is used for depletion of ozone during months of:
Question # 19
Transformation is a cyclic process in which used plactic is
Question # 20
Which gases are produced from landfills?
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 -
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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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MCAT Chemistry Chapter 21 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | Polycyclic aromatic hydrocarbons are taught to be |
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
|
| 2 | A chemist says that glass must be a super cooled liquid. the reason that he might have in his mind is that glass has: |
A. Definite shape
B. Definite volume
C. Crystalline structure
D. No crystalline structure
|
| 3 | Which heavy metals do not have any safe limits |
A. As
B. Hg
C. Cr
D. All of these
|
| 4 | Density of water becomes maximum at |
A. 10°C
B. 4°C
C. 5°C
D. 12°C
|
| 5 | The normal amount of overhead ozone is about |
A. 250 Du
B. 300 DU
C. 350 DU
D. 400 DU
|
| 6 | Which is the following is true about galvanic cell: |
A. Reduction occurs at cathode
B. Reduction occurs at anode
C. Anode is negatively charged
D. Chathode is positively charged
|
| 7 | A single chlorine free radical can destory how many ozone molecules |
A. 10
B. 100
C. 1000
D. 10000
|
| 8 | Hydrosphere includes |
A. Seas and rivers
B. Ocean & polar ice caps
C. Ground water
D. All of above
|
| 9 | Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen |
A. 2 days
B. 5 days
C. 6 days
D. 7 days
|
| 10 | Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects: |
A. Eyes
B. Ears
C. Stomach
D. Nose
|
Test Questions