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.

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

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Munaza 11 - Oct - 2022 00 Min 07 Sec 20/20
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Sania Abbas 25 - Jul - 2022 06 Min 13 Sec 16/20
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tahreem fatima 12 - Nov - 2022 00 Min 04 Sec 15/20
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Faiz Barvi443 19 - Mar - 2023 03 Min 29 Sec 14/20
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Urooj Wajid 15 - Sep - 2022 06 Min 47 Sec 13/20
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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	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
2	Which is not a component of environment?	A. Biosphere B. Lithosphere C. Hydrosphere D. None of these
3	Chloroform is carcinogenic:	A. Heart B. Lungs C. Liver D. Kidney
4	The toxic organic compounds and heavy metals and metalloids results in contamination of	A. surface water B. ground water C. both surface and ground water D. neither surface nor ground waters
5	A pollutant affects	A. Human affects B. Quality of life C. Functioning of ecosystem D. All of these
6	In the atmosphere, O₂is about	A. 10% B. 15% C. 21% D. 25%
7	Ph of unpolluted rain water is	A. 07 B. Less than 6 C. 5.6 D. Less than 5
8	Increased awareness of environmental issues has led chemists to develop products and processes that do not impact on the environment in terms of pollution or depletion of sources. To help chemist to achieve this aim, some principles are drawn. Which one is not the guiding principle	A. Avoid waste production B. Use no solvent C. Use a catalyst D. Devise a multistep procedure for synthesis of new compounds
9	The normal amount of overhead ozone is	A. 350 DU B. 450 DU C. 400 DU D. 300 DU
10	Contamination of water of tanning industries is due to:	A. Cr(III) B. Cr(VI) C. Mn(III) D. Mn(VII)

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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

In incinerating the waste is burnt at

Amount of fresh water used by agriculture is

A single chlorine free radical can destroy how many ozone molecules

Industrial effluents have toxic synthetic organic compounds as well as heavy metals like

Site of land for landfill is selected based upon.

Components of environment is (in km) around the earth:

The main pollutant of leather in the waste water is due to the salt of:

The scope of environmental chemistry is to study:

The gases in the atmosphere are essential for sustaining life on earth. Thus oxygen is required for breathing. What for is carbon dioxide required

The yellow color present in the photo chemical smog is due to presence of the

Hydrosphere includes

Men residence time of methane in atmosphere in years is:

Ozone is present in layer around earth:

Which is the following is true about galvanic cell:

Many petroleum products are:

BOD is the oxygen demand with in day(s):

99.5% mass of lithosphere is made of

Ozone is produced in regions:

Which is not the affect of polluted air on environment

Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in

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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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