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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
In the atmosphere, O2is about
Question # 2
Newspapers can be recycled again and again by how many times
Question # 3
Which is not the affect of polluted air on environment
Question # 4
Which one of the pollutants of automobile exhausts affects the nervous system or produces mental diseases
Question # 5
Which one of the following is an organic compound?
Question # 6
The pH of the rain water in areas where acid rain is the cause of pollution may be
Question # 7
What is the morality of a solution containing 15g of urea is 500cm3 of solution?
Question # 8
Choose the chief air pollutant among the following which depletes ozone layer
Question # 9
Augus smith discovered in the mid of seventeenth century:
Question # 10
Natural water is
Question # 11
Diseases like dysentery, typhoid and hepatitis are caused by mixing of in water:
Question # 12
alum or aluminium sulphate used as coagulant in alkaline medium change into precipitate of radicals of alumimium.
Question # 13
Which of the following waster material is not recycled for use again
Question # 14
How much pesticides have been synthesized at present?
Question # 15
The normal amount of overhead ozone is about
Question # 16
How much quantity of total water is available as fresh water
Question # 17
Eleven elements made part of earth mass:
Question # 18
The pH range of acid rain is?
Question # 19
The range of UV-B is:
Question # 20
The ozone depletion in the stratophere is mainly due to the reaction of ozone with
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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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 | CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destory |
A. 50,000
B. 10,000
C. 20,000
D. None of these
|
| 2 | SO2and NO2cause pollution due to increase in |
A. Buffer action
B. Basicity
C. Acidity
D. Neutrality
|
| 3 | The process of coagulation can remove suspended solids in raw water about |
A. 50%
B. 60%
C. Less than 40%
D. More than 80%
|
| 4 | Commonly used coagulants are ions of: |
A. Ferrous
B. Al
C. Cr
D. Ferric
|
| 5 | It is a biodegradable pollutant |
A. Salts of HG
B. DDt
C. Aluminum foil
D. Domestic fuel
|
| 6 | Components of environment is (in km) around the earth: |
A. 10 km
B. 100 km
C. 1000 km
D. 1500 km
|
| 7 | Ozone is most of the tropical regions acts as a pollutant and causes |
A. Damages to eyes
B. Aggravates asthma
C. Chest discomfort
D. All of these
|
| 8 | Unit of ozone is? |
A. Debye
B. Dobson
C. Esu
D. Coulumb
|
| 9 | Chemicals used to kill pests are: |
A. Herbicides
B. Insecticides
C. Pesticides
D. fungicides
|
| 10 | Soil remediation means |
A. to make it suitable for cultivation of crops
B. to make it acidic
C. to make it alkeline
D. to add manure into it
|
Test Questions