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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MCAT Chemistry Chapter 21 Important MCQ's

Sr.#	Question	Answer
1	Ratio of hydrogen (H) and oxygen (O) in water molecule by volume is	A. 2: 1 B. 1: 2 C. 3: 1 D. 4: 1
2	Which of following is primary pollutants	A. N₂O B. PAN C. H₂SO₄ D. None of these
3	Organic pollutants in water are measured by	A. DO B. COD C. Water logging D. PH
4	alum or aluminium sulphate used as coagulant in alkaline medium change into precipitate of radicals of alumimium.	A. sulphates B. oxides C. hydroxides D. chlorides
5	The normal amount of overhead ozone is about in DU:	A. 150 B. 250 C. 350 D. 450
6	Which gas produces air pollution?	A. oxides of sulphur B. oxides of carbon C. all of these
7	Heat balance of earth is maintained by sphere:	A. Hydrosphere B. atmosphers C. lithosphere D. biosphere
8	In the atosphere, CO₂is about	A. 0.01% B. 0.03% C. 0.05% D. 0.09%
9	Most harmful of biosphere is	A. Deforestation B. Nuclear fail out C. Salinity D. Water logging
10	Chlorofluorocarbon, CF₂Cl₂, plays an effective role in removing O₃(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

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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

Most harmful of biosphere is

Which of the following does not contribute towards the formation of photochemical smog?

Transformation is a cyclic process in which used plactic is

A single chlorine free radical can destroy how many ozone molecules

Ozone is usually produced in the

In water the most important oxidizing agent is dissolved molecular oxygen which ranges form

Diseases like dysentery, typhoid and hepatitis are caused by mixing of in water:

When chlorofluoro carbon are subjected to U.V they form

A chemist says that glass must be a super cooled liquid. the reason that he might have in his mind is that glass has:

Property due to which water acts as a universal solvent is

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

Fresh water of total earth water is:

Which of the following air pollutant is called quiet killer

Suspended matter is settled in purification of water by:

In the atosphere, CO2is about

Water is considered pollutant when value of Do is

Residence time of methane in the atmosphere is

Density of water becomes maximum at

The force which hold the atoms together to form a compound is called:

Splitting of spectral lines when atoms are subjected to strong electric field is called:

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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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In the atosphere, CO₂is about