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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Meer Sadeed 07 - Sep - 2023 10 Min 50 Sec 13/20
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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	Hydrosphere covers the surface of erath:	A. 70.8% B. 71.8% C. 72.8% D. 73.8%
2	As the number of carbon atoms increase the number of isomers also increase. The six carbon compound hexane has as many as:	A. 10 isomers B. 3 isomers C. 5 isomers D. 6 isomers
3	Leachate contains:	A. fatty acids B. Bacteria C. Heavy metals D. All of these
4	Which is not the condition for the formation of smog	A. there must be sufficient NO gas B. there must be sunlight to help photo chemical reactions to take place C. air must be blowing swifty D. there must be SO₂in the air
5	Detergents are surfactants and they reduce the	A. B.P. of water B. Surface tension of water C. Wetting ability of water D. None of these
6	Water bodies are included in:	A. Atmosphere B. Hydrosphere C. Lithosphere D. All of these
7	SO₂makes ___________ acid rains	A. carbonic acid B. Sulfuric C. Nitric acid D. All of these
8	By the mid of 1980s depletion of total overhead ozone in antarctic region is	A. 20% B. 30% C. 40% D. 50%
9	The normal amount of overhead ozone is	A. 350 DU B. 450 DU C. 400 DU D. 300 DU
10	Factors affecting quality of water:	A. D.O B. BOD C. COD D. a,b,c

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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

When chlorofluoro carbon are subjected to U.V they form

Which gas produces air pollution?

Alkali metals react viotlently with halogens:

Chemicals used to kill pests are:

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

Term ozone hole is used for depletion of ozone during months of:

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

Pan is an irritant to human beings and it affects

In purification of potable water the coagulant used is:

The 95.5% mass of Lithoshone is made of 11 elements i,e O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. Which element is present in trace amount

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will not cause water pollution

Which of the following is not a secondary pollutant

Chemical equilibrium involving reactants and products in more than one phase is called:

Dissolved impurities of potable water can be separated by the process of

Which of the following waste material is not recycled for use again

Ozone in stratosphere extends upto km:

One of the environmental problem is the formation of oil slicks when oil is spilled form tankers in sea water. Which treatment is suitable to remove oil slicks

Water exist in only

In big/metropolitan cities, atmosphere is mostly polluted due to

Many petroleum products are:

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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

The 95.5% mass of Lithoshone is made of 11 elements i,e O₂, Si, Al, Fe, Ca, Na, K, Mg, Ti, H₂and P. Which element is present in trace amount