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

Which is not the condition for the formation of smog

Question # 2

Contamination of water of tanning industries is due to:

Question # 3

Chlorination of water is effective for

Question # 4

Heat balance of earth is maintained by sphere:

Question # 5

Amount of fresh water used by agriculture is

Question # 6

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

Question # 7

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

Question # 8

In incinerating the waste is burnt at

Question # 9

Ecosystem is a smaller unity of

Question # 10

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 # 11

Which of the following factors is not used to determine the quality of water

Question # 12

Which step is unnecessary for purification of water for drinking purposes

Question # 13

Which of the following air pollutant is called quiet killer

Question # 14

Polar ice caps and glaciers consists total earth water:

Question # 15

Water is essential for life on

Question # 16

Why a C - Cl bond breaks by uv light

Question # 17

Hydrocarbons, SO2, CO, NH3nitrogen oxides and compounds of fluorine are called

Question # 18

Ozone layer is high:

Question # 19

Water which his considered to be safe for human consumption is known as

Question # 20

A single chloride free radical can destroy the ozone molecules

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Sr.# Question Answer
1 Coal contains sulphur in it:
A. 1-3%
B. 1-6%
C. 1-9%
D. 1-12%
2 Out of total amount of water available for human use is
A. 0.30%
B. 0.2%
C. 40%
D. 50%
3 Materials suspended in water or present as colloidal form in raw water are removed by:
A. aeration
B. coagulation
C. chlorination
D. treatment
4 Amount of ozone in atmosphere is expressed in units:
A. Kilograms
B. cm
C. molarity
D. DU
5 Addition of washing soda removes
A. Softness of water
B. Temporary hardness of water
C. Permanent hardness of water
D. Hydrogen from water
6 Term ozone hole is used for depletion of ozone during months of:
A. Jan-Feb
B. March - Sep
C. Sep- Nov
D. Dec-Feb
7 Water exist in only
A. One state
B. Two state
C. Three states
D. 4 states
8 Which is property of CO?
A. Soluble in water
B. Insoluble in water
C. No toxic
D. Pole coloured
9 Leaching of nutrients is due to
A. Drying of soil
B. Combustion of soil
C. Acidification of soil
D. Neutralization of soil
10 Phenomenon of acid rains gain importance in:
A. 1930s
B. 1940s
C. 1950s
D. 1960s
11 The destructive distillation of coal gives three products. which of following is not the product of destructive distillation of coal?
A. Coal tar
B. CO2
C. Coal gas
D. Coke
12 Newspaper can be recycled again and again by how many times?
A. 2
B. 3
C. 4
D. 5
13 The pH rain of acid rain is
A. 8 - 7
B. 7 - 6.5
C. 6.5 - 6
D. less than 5
14 Chose a point which is not included in the components of environment
A. Stratosphere
B. Hydrosphere
C. Lithosphere
D. Biosphere
15 Organic pollutants in water are measured by
A. DO
B. COD
C. Water logging
D. PH
16 The main pollution of leather tanneries in the waste is due to the salt of
A. Chromium
B. Copper
C. Chromium
D. Lead
17 Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as
A. environment
B. hydrosphere
C. pollutant
D. biosphere
18 Which is used as a coagulant:
A. Ferric salts
B. Potash alum
C. a and b both
D. Chlorine
19

Natural water is
A. Pure
B. Impure
C. Acts as solute
D. Distilled
20 The overall effect of the photochemical smog in the after noon is built up of
A. Neutralization
B. oxidizing agent
C. Reducing agent
D. Activating agent

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