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

99.5% mass of lithosphere is made of

Question # 2

The amount of Si in the lithosphere is about

Question # 3

Which factor is helping to reduce the environmental pollution

Question # 4

Which is not an air pollutant

Question # 5

Air pollution causes

Question # 6

Coal contains percentage of sulphur:

Question # 7

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

Question # 8

Elements in lithosphere exist generally as:

Question # 9

Nitrogen percentage in atmosphere is:

Question # 10

Eleven elements made part of earth mass:

Question # 11

During thunderstorms, water dissolves

Question # 12

Ozone is a gas having boiling point

Question # 13

A single chlorine free radical can destory how many ozone molecules

Question # 14

Ozone acts as:

Question # 15

Water which forms scum with soap is called

Question # 16

Three elements needed for the healthy growth of plants are

Question # 17

Ocean contains part earth's water:

Question # 18

Increased awareness of environment issues has led chemist 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

Question # 19

Requirement of macronutrient per acre of the land is

Question # 20

Which gases are produced from landfills?

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 The main pollution of leather tanneries in the waste is due to the salt of
A. Chromium
B. Copper
C. Chromium
D. Lead
2 Water is considered pollutant when value of Do is
A. 6 PPM
B. 8 PPM
C. 03 PPM
D. 10 PPM
3 Alkali metals react viotlently with halogens:
A. Halides
B. Anhydrides
C. Hydrides
D. None of the above
4 Out of total amount of water available for human use is
A. 0.30%
B. 0.2%
C. 40%
D. 50%
5
Major cause of SO2 on global scale is
A. Volcanoes
B. Electric sparks
C. Combustion
D. All
6 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
7 Nitrogen percentage in atmosphere is:
A. 76%
B. 77%
C. 78%
D. 79%
8 By the mid of 1980s depletion of total overhead ozone in antarctic region is
A. 20%
B. 30%
C. 40%
D. 50%
9 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
10 Which factor is helping to reduce the environment pollution
A. rapid growth population
B. urbanization
C. idustrialization
D. increase of plantation

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