MDCAT Chemistry Chapter 21 online mcq test with answers for chapter 21 (Environmental Chemistry)

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.

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Rana Ubaid Chohan 16 - Jul - 2022 10 Min 50 Sec 13/20

MCAT Chemistry Chapter 21 Important MCQ's

Sr.#	Question	Answer
1	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
2	Hydrosphere includes	A. Seas and rivers B. Ocean & polar ice caps C. Ground water D. All of above
3	Nitrogen in the atmosphere is:	A. 78% B. 21% C. 0.9% D. 0.03%
4	Pathogens in raw water are killed in step:	A. aeration B. coagulation C. chlorination D. treatment
5	Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will not cause water pollution	A. live stock waste B. agricultural pesticides C. oil beaks and spills D. all of the above
6	Ozone is produced in regions:	A. tropical B. Polor C. antaric D. equator
7	The normal amount of overhead ozone is about in DU:	A. 150 B. 250 C. 350 D. 450
8	The range of UV-B is:	A. 320 to 400 nm B. 200 to 280 nm C. 280 to 320 nm D. 50 to 400 nm
9	What is the effect of polluted air on environment	A. Ozone B. Acid rain C. Global warming D. Smog
10	Depletion of ozone is more during the month:	A. Jan-March B. April-Jun C. July-Aug D. Sept-Nov

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MDCAT Chemistry Chapter 21 MCQ Test With Answer for (Environmental Chemistry)

MCQ's Test For MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

As the number of carbon atoms increase the number of isomers also increase. The six carbon compound hexane has as many as:

Ozone is most of the tropical regions acts as a pollutant and causes

Troposphere extends upto km:

Polar ice caps can melt due to

The normal amount of overhead ozone is

Reason of pollution are:

Which is unnecessary for purification of water for drinking purposes

Chlorofluorocarbon, CF2Cl2, plays an effective role in removing O3(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Water which his considered to be safe for human consumption is known as

The process of coagulation can remove suspended solids in raw water about

Unit of ozone is?

Water is essential for life on

Which not a method for solid waste management>

COD of water can be measured by

Electropositive character increases down the groups due to:

Potable water is considered to be

Ecosystem is a smaller unity of

Coagulation in the purification of water is carried out by

Water is considered pollutant when value of Do is

Ozone is present in layer around earth:

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Set 12

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Set 17

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Top Scorers Of MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test MCQ`s Test

MCAT Chemistry Chapter 21 Important MCQ's

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Chlorofluorocarbon, CF₂Cl₂, plays an effective role in removing O₃(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone