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

Why a C - Cl bond breaks by uv light

Question # 2

The layer of earth around the earth is called:

Question # 3

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

Question # 4

One of the environmental problem is the formation of oil slicks when oil is spilled form tankers in sea water. Which treatment is suitable to remove oil slicks

Question # 5

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

Question # 6

What is component of environment?

Question # 7

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

Question # 8

The water is considered to be polluted when the concentration of oxygen in it is

Question # 9

Chlorofluorocarbons and aerosols are inert in sphere:

Question # 10

Lithosphere extends upto kilometer of earth crust in depth:

Question # 11

The pH range of the acid rain is

Question # 12

Which one of the following is an organic compound?

Question # 13

Nitrogen percentage in atmosphere is:

Question # 14

During thunderstorms, water dissolves

Question # 15

Ecosystem is a smaller unity of

Question # 16

The temperature in the incineration of industrial and hazardons waster process had a range

Question # 17

Coagulation in the purification of water is carried out by

Question # 18

Boron, aluminium, gallium, indium and thallium belong to group lll-A of the periodic table show a decrease with increasing relative atomic mass:

Question # 19

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Question # 20

Chemicals used to kill fungi are:

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Incineration is a process in which solid waste is burned at high temperature ranging from
A. 500 to 600°C
B. 900 to 1000°C
C. 1000 to 1100°C
D. 600 to 700°C
2 Augus smith discovered in the mid of seventeenth century:
A. acid
B. Base
C. Acid rain
D. Fertilizer
3 Phenomenon of acid rains gain importance in:
A. 1930s
B. 1940s
C. 1950s
D. 1960s
4 Water which his considered to be safe for human consumption is known as
A. distilled water
B. contaminated water
C. potable water
D. rain water
5 The branch of chemistry interlinked with biology, physics, medicines, agriculture, public health and sanitary engineering etc. is:
A. Biochemistry
B. Physical chemistry
C. Pharmaceutical chemistry
D. Environmental chemistry
6 Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen
A. 2 days
B. 5 days
C. 6 days
D. 7 days
7 Temporary hardness can be removed by adding
A. Lime
B. Carbon
C. Oxygen
D. Slaked lime
8 Boron, aluminium, gallium, indium and thallium belong to group lll-A of the periodic table show a decrease with increasing relative atomic mass:
A. Ionic character of the compounds
B. The first ionization energy 
C. The basic character of the oxides
D. The stability of +2 oxidation
9 Fungicides are the pesticides which:
A. Control the growth of fungus
B. Kills insects
C. Kills plants
D. Kill herb
10 Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in
A. Atmosphere
B. Lithosphere
C. Hydrosphere
D. Biosphere

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