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

Poisoning of CO can be reveresed by giving oxygen at pressure:

Question # 2

Contamination of water of tanning industries is due to:

Question # 3

Which one of the pollutants of automobile exhausts affects the nervous system or produces mental diseases

Question # 4

Biochemical oxygen demand (BOD) is the capacity of organic matter in natural water to consume oxygen with in a period of

Question # 5

Factors affecting quality of water:

Question # 6

What is the effect of polluted air on environment

Question # 7

alum or aluminium sulphate used as coagulant in alkaline medium change into precipitate of radicals of alumimium.

Question # 8

White marble buildings are effected by?

Question # 9

BOD means

Question # 10

The % of CO2in the atmosphere is

Question # 11

Surface and ground water sources are contaminated by various human activities. Which of the following is not a human activity that causes contamination in fresh water

Question # 12

Lithosphere extends upto kilometer of earth crust in depth:

Question # 13

Rigid rocky crust earth upto a depth of 100 km is called:

Question # 14

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

Question # 15

Ozone is produced in regions:

Question # 16

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

Question # 17

The concentration of dissolved molecular oxygen in water which acts as the most important oxidizing agent ranges from

Question # 18

Exposure to CO results in

Question # 19

Density of water becomes maximum at

Question # 20

Chemical like Al2(SO4) or alum are used in purification of water druing step:

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Leather tanneries use big auantities of:
A. Cr Vi salts
B. Cr III salts
C. Mn-salts
D. Pb-salts
2 The rigid rocky part of earth crust called lithosphere extends upto a depth of:
A. 10 km
B. 100 km
C. 1000 km
D. 1500 km
3 Term ozone hole is used for depletion of ozone during months of:
A. Jan-Feb
B. March - Sep
C. Sep- Nov
D. Dec-Feb
4 Most harmful of biosphere is
A. Deforestation
B. Nuclear fail out
C. Salinity
D. Water logging
5 Smaller unit of biosphere is:
A. specie
B. ecosystem
C. plankton
D. troposphere
6 Which is not considered as pollutant
A. O3
B. CO2
C. NO2
D. SO2
7 The layer of earth around the earth is called:
A. Atmosphere
B. Hydrosphere
C. Lithosphere
D. Biosphere
8 The percentage of SO2 produced by volcanoes is:
A. 47%
B. 57%
C. 67%
D. 77%
9
Which of the following is not a secondary pollutant
A. Ozone
B. Carbonic acid
C. Sulphuric acid
D. Carbon dioxide
10 BOD means
A. Boron oxygen deuterium
B. Biochemical oxygen demand
C. Biochemical oxygen dissolved
D. Biochemical oxygen death

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