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

Alkali metals react viotlently with halogens:

Question # 2

Ozone is effectively removed by

Question # 3

Which factor is helping to reduce the environment pollution

Question # 4

Which is not an air pollutant

Question # 5

Polycyclic aromatic hydrocarbons are taught to be

Question # 6

Which is not considered as pollutant

Question # 7

Elevated concentration of ______________ is harmful for fish as it clog the gills causing suffocation

Question # 8

An excellent source of energy without causing pollution is

Question # 9

Ozone in stratosphere extends upto km:

Question # 10

Contaminated soil can be cleaned by various methods. Which method is not used to clean the soil

Question # 11

BOD is the oxygen demand with in day(s):

Question # 12

How much quantity of total water is available as fresh water

Question # 13

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

Question # 14

The percentage of SO2 produced by volcanoes is:

Question # 15

Which one of the following is not a component of environment

Question # 16

Air pollution causes

Question # 17

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 # 18

The respiration process taking place in animals depends on a difference in 

Question # 19

Which one of the following does not act as pollutant

Question # 20

Elements in lithosphere exist generally as:

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 In water the most important oxidizing agent is dissolved molecular oxygen which ranges form
A. 2 - 4 ppm
B. 4 - 6 ppm
C. 2 - 5 ppm
D. 4 - 8 ppm
2 How can heavy metal contamination like the presence of Hg or Pb may be removed from the soil
A. by using water spray
B. by blowing air
C. by treating with EDTA and then flushing the heavy metal complex out of the soil
D. by adding CaO
3 Which one of the following is not a component of environment
A. Biosphere
B. Stratosphere
C. Hydrosphere
D. Lithosphere
4 Which is used as a coagulant:
A. Ferric salts
B. Potash alum
C. a and b both
D. Chlorine
5 SO2and NO2cause pollution due to increase in
A. Buffer action
B. Basicity
C. Acidity
D. Neutrality
6 Lanthanides an actinides belong to following group of periodic table:
A. IB
B. VIIIB
C. IIB
D. IIIB
7 Hard water can block radiators due to formation of
A. Insoluble calcium and magnesium salts
B. Insoluble sodium salts
C. In soluble phosphate salts
D. Insoluble potassium salts
8 Polar ice caps and glaciers consists total earth water:
A. 1%
B. 2%
C. 3%
D. 4%
9 Chlorination of water is effective for
A. Killing pathogens
B. Removing dust
C. Removing hardness
D. Increasing oxygen content
10 Part of fresh water consumed in industry is:
A. 1%
B. 2%
C. 69%
D. 23%

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