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 of the following substance is not present in acid rain?

Question # 2

The Catalyst used in the contact tower for the manufacture of H2SO4  is easily poisoned by:

Question # 3

What is component of environment?

Question # 4

Leather tanneries use big auantities of:

Question # 5

Amount of fresh water used by agriculture is

Question # 6

Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen

Question # 7

Which one of the following is not a component of environment

Question # 8

Main cause of reducing map is:

Question # 9

Which one of the following is an organic compound?

Question # 10

A single chlorine free radical can destory how many ozone molecules

Question # 11

Insoluble ferric oxide is produced in the pH range:

Question # 12

Water is purified by the process:

Question # 13

The reason of acid rains is

Question # 14

Part of fresh water consumed in industry is:

Question # 15

Which of the following waster material is not recycled for use again

Question # 16

Photo chemical smog contains ______ as main reactants

Question # 17

What is the effect of polluted air on environment

Question # 18

HOCl is a compound:

Question # 19

Ozone is most of the tropical regions acts as a pollutant and causes

Question # 20

Commonly used coagulants are ions of:

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Dissolved impurities of potable water can be separated by the process of
A. reduction
B. Aeration
C. Electrolysis
D. Co-angulation
2 Polycyclic aromatic hydrocarbons are taught to be
A. Disinfectant
B. Carcinogenic
C. Helpful
D. Reactive
3 Exposure to CO results in
A. Headche
B. Fatigue
C. Unconsciousness
D. All of these
4 Hardness which can be removed by boiling is called
A. Permanent hardness
B. Temporary hardness
C. Stiffness
D. Toughness
5 Men residence time of methane in atmosphere in years is:
A. 1-7
B. 2-7
C. 3-7
D. 4-7
6 Contamination of water of tanning industries is due to:
A. Cr(III)
B. Cr(VI)
C. Mn(III)
D. Mn(VII)
7 Petroleum or crude oil is a complex mixture of compounds mainly:
A. benzene
B. minerals
C. hydrocarbons
D. phenols
8 Ozone layer is high:
A. 20-23 km
B. 22-25 km
C. 23-26 km
D. 25-28 km
9 Most harmful of biosphere is
A. Deforestation
B. Nuclear fail out
C. Salinity
D. Water logging
10 Suspended matter is settled in purification of water by:
A. aeration
B. coagulation
C. chlorination
D. treatment

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