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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
Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
Question # 2
Water is considered pollutant when value of Do is
Question # 3
The largest item which is recycled is
Question # 4
The rigid rocky part of earth crust called lithosphere extends upto a depth of:
Question # 5
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 # 6
Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg Toxic.
Question # 7
During thunderstorms, water dissolves
Question # 8
Ozone layer is
Question # 9
Chemical equilibrium involving reactants and products in more than one phase is called:
Question # 10
Materials suspended in water or present as colloidal form in raw water are removed by:
Question # 11
Which one of the following does not act as pollutant
Question # 12
The percentage of SO2 produced by volcanoes is:
Question # 13
Oxides of sulphur react in atmosphere by various reactions to form:
Question # 14
Ocean contains part earth's water:
Question # 15
Ozone is most of the tropical regions acts as a pollutant and causes
Question # 16
Contaminated soil can be cleaned by various methods. Which method is not used to clean the soil
Question # 17
BOD is the oxygen demand with in day(s):
Question # 18
The layer of gases around the earth are called?
Question # 19
SO2 produced by volcanoes is about
Question # 20
Unit of ozone is?
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
20 Questions
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Set 5
20 Questions
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Set 6
20 Questions
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Set 7
20 Questions
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Set 8
20 Questions
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Set 9
20 Questions
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Set 10
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Set 11
20 Questions
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Set 12
20 Questions
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Set 13
20 Questions
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Set 14
20 Questions
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Set 15
20 Questions
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Set 16
20 Questions
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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 -
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D Dania 01 - Jan - 2023 14 Min 03 Sec 14/20 -
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R Rana Ubaid Chohan 16 - Jul - 2022 10 Min 50 Sec 13/20
MCAT Chemistry Chapter 21 Important MCQ's
| Sr.# | Question | Answer |
|---|---|---|
| 1 | How can heavy metal contamination like the presence of Hg or Pb may be removed from the soil |
A. by using water spray
B. by blowing air
C. by treating with EDTA and then flushing the heavy metal complex out of the soil
D. by adding CaO
|
| 2 | By the mid of 1980s depletion of total overhead ozone in antarctic region is |
A. 20%
B. 30%
C. 40%
D. 50%
|
| 3 | It is a biodegradable pollutant |
A. Salts of HG
B. DDt
C. Aluminum foil
D. Domestic fuel
|
| 4 | Which is property of CO? |
A. Soluble in water
B. Insoluble in water
C. No toxic
D. Pole coloured
|
| 5 | Which is not an air pollutant |
A. N2
B. CO
C. NO
D. N2O
|
| 6 | For incineration temperature range is (in oC) |
A. 700-800
B. 800-900
C. 900-1000
D. 1000-1100
|
| 7 | SO2and NO2cause pollution due to increase in |
A. Buffer action
B. Basicity
C. Acidity
D. Neutrality
|
| 8 | Coagulation in the purification of water is carried out by |
A. Alum
B. NiSO4
C. BaSO4
D. CuSO4
|
| 9 | The pH range of acid rain is? |
A. 7-6.5
B. 6.5-6
C. 6-5.6
D. Less than 5
|
| 10 | Troposphere extends upto km: |
A. 0-15 km
B. 10-15 km
C. 15-40 km
D. 15-40 km
|
Test Questions