MDCAT Chemistry Chapter 21 MCQ Test With Answer for (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.

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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MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

00:00
Question # 1

In incinerating the waste is burnt at

Question # 2

Main cause of reducing map is:

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Which of following is primary pollutants

Question # 7

Coal contains percentage of sulphur:

Question # 8

What is the morality of a solution containing 15g of urea is 500cm3 of solution?

Question # 9

Ozone layer is

Question # 10

The rigid rocky part of earth crust called lithosphere extends upto a depth of:

Question # 11

Sea gets polluted bu accidental oil spills and

Question # 12

Lithosphere extends upto kilometer of earth crust in depth:

Question # 13

Photochemical smog consists of higher concentration of:

Question # 14

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

Question # 15

How much pesticides have been synthesized at present?

Question # 16

The eleventh concentration of metal cause clogs of gills in fish:

Question # 17

Biological oxygen demand (BOD) is associated with

Question # 18

The reason of acid rains is

Question # 19

Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen

Question # 20

Which is not an air pollutant

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Photo chemical smog contains ______ as main reactants
A. Nitrons oxide and unburnt hydrocarbons
B. Nilric oxide and unburnt hydrocarbons
C. No and burnt hydrocarbons
D. N2O and burnt hydrocarbons
2 Oceans cove ____________ percent of the surface of the earth
A. 60
B. 70
C. 80
D. 97
3 BOD is the oxygen demand with in day(s):
A. Four
B. Two
C. Three
D. Five
4 Transportation causes to produce CO2 in atmosphere:
A. 72%
B. 73%
C. 74%
D. 75%
5 Which gases are produced from landfills?
A. NH3
B. H2S
C. N2
D. All of these
6 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
7 Polar ice caps and glaciers consists total earth water:
A. 1%
B. 2%
C. 3%
D. 4%
8 Ozone is produced in regions:
A. tropical
B. Polor
C. antaric
D. equator
9 Why a C- C bond breaks by uv light
A. Cl is most electronegative
B. Cl is volatile
C. C - Cl bond energy is smaller than that of C - H bond energy
D. uv light provides energy which is sufficient to break C - Cl bond and not C - H bond
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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