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

Why a C- C bond breaks by uv light

Question # 2

Industrial effluents have toxic synthetic organic compounds as well as heavy metals like

Question # 3

The % of CO2in the atmosphere is

Question # 4

Many petroleum products are:

Question # 5

What is the cause of water pollution

Question # 6

Elements in lithosphere exist generally as:

Question # 7

Water which forms scum with soap is called

Question # 8

Heat balance of earth is maintained by sphere:

Question # 9

Coagulation in the purification of water is carried out by

Question # 10

The range of UV-B is:

Question # 11

Reason of pollution are:

Question # 12

In the atmosphere, O2is about

Question # 13

Diseases like dysentery, typhoid and hepatitis are caused by mixing of in water:

Question # 14

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

Question # 15

The pH range of the acid rain is

Question # 16

Exposure to CO results in

Question # 17

Oxides of sulphur react in atmosphere by various reactions to form:

Question # 18

Volcanoes produce SO2:

Question # 19

Phenomenon of acid rains gain importance in:

Question # 20

Fungicides are the pesticides which:

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Atmosphere consists of gasses:
A. N2
B. O2
C. Ar
D. All
2 Choose the chief air pollutant among the following which depletes ozone layer
A. Carbon monoxide
B. Carbon dioxide
C. Chloroflurocarbons and nitrogen oxides
D. Sulphur dioxide
3 Surface and ground water sources are contaminated by various human activities which of the followings is not a human activity that causes contamination in fresh water
A. live stock waste
B. oil leaks and spills
C. disposal of industrial effluents
D. rain
4 The largest item which is recycled is
A. newspaper
B. plastic
C. aluminium
D. oil
5 Dissolved impurities of potable water can be separated by the process of
A. reduction
B. Aeration
C. Electrolysis
D. Co-angulation
6 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
7 Unit of ozone is?
A. Debye
B. Dobson
C. Esu
D. Coulumb
8 Which heavy metals do not have any safe limits
A. As
B. Hg
C. Cr
D. All of these
9 How much quantity of water is in the domestic use
A. 0.08%
B. 16%
C. 24%
D. 90%
10
Three elements needed for the healthy growth of plants are
A. N P K
B. N K C
C. N S P
D. N Ca P

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