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

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Question # 1

The temperature in the incineration process has a range:

Question # 2

Photochemical smog consists of higher concentration of:

Question # 3

Amount of fresh water used by agriculture is

Question # 4

The normal amount of overhead ozone is about

Question # 5

Which heavy metals do not have any safe limits

Question # 6

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

Question # 7

Which of the following is not a heavy industry?

Question # 8

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

Question # 9

Which is the following is true about galvanic cell:

Question # 10

The overall effect of the photochemical smog in the after noon is built up of

Question # 11

The suspended particles in the raw water can be removed by the

Question # 12

Volcanoes produce SO2:

Question # 13

The morality of the solution containing x grams ammonium sulfate in 500cm3 of the solution is 0.6 what is x?

Question # 14

What is the effect of polluted air on environment

Question # 15

Newspaper can be recycled again and again by how many times?

Question # 16

Amount of ozone in atmosphere is expressed in units:

Question # 17

Chlorination of water is effective for

Question # 18

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

Question # 19

Elements in lithosphere exist generally as:

Question # 20

Carbon Monoxide is:

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Contamination of water of tanning industries is due to:
A. Cr(III)
B. Cr(VI)
C. Mn(III)
D. Mn(VII)
2 The normal amount of overhead ozone is about in DU:
A. 150
B. 250
C. 350
D. 450
3 One of the environment problem is the formation of oil slicks when oil is spilled from tankers in sea water.
Which treatment is suitable to remove oil slicks
A. blow air
B. add Na2CO3
C. use a specially made sorbent having fluorine trapped in it
D. Use a sorbent having Al2O3trapped in it
4 Property due to which water acts as a universal solvent is
A. Polarity
B. It's ability to make hydrogen bond
C. Both A and B
D. Strong dipole dipole interaction
5 Hydrosphere covers the surface of erath:
A. 70.8%
B. 71.8%
C. 72.8%
D. 73.8%
6 The ozone depletion in the stratophere is mainly due to the reaction of ozone with
A. Freons
B. CFCs
C. Both A and B
D. None
7 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
8 Which is unnecessary for purification of water for drinking purposes
A. Coagulation
B. Aeration
C. Treatment with Iodine
D. Treatment with chlorine
9 The main pollution of leather tanneries in the waste is due to the salt of
A. Chromium
B. Copper
C. Chromium
D. Lead
10 0.1M HCI having pH =1.0 it is about 100 time stronger than acetic acid what will be the pH of acetic acid:
A. 0.1 
B. 1.3
C. 2
D. 3

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