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

The rigid rocky part of earth crust called lithosphere extends upto a depth of:

Question # 2

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

Question # 3

BOD means

Question # 4

Hardness which can be removed by boiling is called

Question # 5

What is the effect of polluted air on environment

Question # 6

Fungicides are the pesticides which:

Question # 7

Increased awareness of environmental issues has led chemists 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 # 8

Ph of unpolluted rain water is

Question # 9

Residence time of methane in the atmosphere is

Question # 10

Ozone is a gas having boiling point

Question # 11

Chromium (VI) is highly toxic and can cause

Question # 12

Transportation causes to produce CO2 in atmosphere:

Question # 13

The amount of Si in the lithosphere is about

Question # 14

Water which forms scum with soap is called

Question # 15

The disposal of domestic refuse, commercial and industrial solid wastes are studied under the title

Question # 16

Chemicals used to kill pests are:

Question # 17

Region of earth capable of supporting life is called:

Question # 18

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will not cause water pollution

Question # 19

Splitting of spectral lines when atoms are subjected to strong electric field is called:

Question # 20

Which one of the following is used as coagulant for purification potable water

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 The film forming components of paints are
A. resins
B. thinners
C. pigments
D. driers
2 For incineration temperature range is (in oC)
A. 700-800
B. 800-900
C. 900-1000
D. 1000-1100
3 Coal contains percentage of sulphur:
A. 1-9%
B. 5-9%
C. 6-9%
D. 7-9%
4 In incinerating the waste is burnt at
A. 1000°C
B. 100°C
C. 2000°C
D. 1500°C
5 Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic
A. It attaches to sulphur of the disulphide link
B. Hg is a heavy metal
C. Hg is liquid at room temperature
D. Hg is reactive chemically
6 A single chlorine free radical can destory how many ozone molecules
A. 10
B. 100
C. 1000
D. 10000
7 Which of the following is not the required condition for the formation of smog
A. Sufficient NO
B. Sunlight
C. Less movement of air
D. Winds
8 Which not a method for solid waste management>
A. Landfill
B. Incinerating
C. Recycling
D. None of these
9 The cause of minamata disease is the pollution of
A. Arsenic (As) into atomosphere
B. Industrial waste having Hg
C. Organic waste in drinking H2O
D. Oil spills in H2O
10 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

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