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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
The Catalyst used in the contact tower for the manufacture of H2SO4 is easily poisoned by:
Question # 2
Which heavy metals do not have any safe limits
Question # 3
Which is used as a coagulant:
Question # 4
Addition of washing soda removes
Question # 5
In incinerating the waste is burnt at
Question # 6
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 # 7
Which factor is helping to reduce the environment pollution
Question # 8
Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg Toxic.
Question # 9
A single free chlorine redical can destroy ozone molecules upto:
Question # 10
Which is the most toxic among the given?
Question # 11
Amount of ozone in atmosphere is expressed in units:
Question # 12
The main pollutant of leather in the waste water is due to the salt of:
Question # 13
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 # 14
The pH range of the acid rain is
Question # 15
Ozone is a gas having boiling point
Question # 16
Water cover earth surface more than:
Question # 17
Polar ice caps can melt due to
Question # 18
The incineration may reduce volume of wastes upto:
Question # 19
COD of water can be measured by
Question # 20
The pH range of acid rain 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
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Set 8
20 Questions
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Set 9
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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 -
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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 -
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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 | Surface and ground water sources are contaminated by various human activities. Which of the following is not human activity that causes contamination in fresh water |
A. Live stock waste
B. Oil leaks and spills
C. Desposal of industrial effluents
D. Rain
|
| 2 | BOD is the oxygen demand with in day(s): |
A. Four
B. Two
C. Three
D. Five
|
| 3 | Hydrosphere includes |
A. Seas and rivers
B. Ocean & polar ice caps
C. Ground water
D. All of above
|
| 4 | Poisoning of CO can be reveresed by giving oxygen at pressure: |
A. low
B. least
C. medium
D. High
|
| 5 | Leaching of nutrients is due to |
A. Drying of soil
B. Combustion of soil
C. Acidification of soil
D. Neutralization of soil
|
| 6 | The process of coagulation can remove suspended solids in raw water about |
A. 50%
B. 60%
C. Less than 40%
D. More than 80%
|
| 7 | Ozone layer is |
A. 25 - 28 km high
B. 26 - 29 km high
C. 24 - 27 km high
D. 20 - 28 km high
|
| 8 | The largest item which is recycled is |
A. newspaper
B. plastic
C. aluminium
D. oil
|
| 9 | CFC's are known to cause depletion of ozone layer therefore their use has been banned in refrigerators and air conditioners. Which alternate compound may be suitable to replace CFC |
A. CCl4
B. CHCl3
C. CH3 - CH2- CH2- CH3
D. CHCl2- CHF2
|
| 10 | How many times a newspaper can be recycled |
A. 02
B. 05
C. 08
D. 10
|
Test Questions