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

Eleven elements made part of earth mass:

Question # 2

Amount of ozone in atmosphere is expressed in units:

Question # 3

How much quantity of total water is available as fresh water

Question # 4

Insoluble ferric oxide is produced in the pH range:

Question # 5

CFCs are mainly used in industries due to

Question # 6

Lithosphere extends upto kilometer of earth crust in depth:

Question # 7

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

Question # 8

Out of total amount of water available for human use is

Question # 9

Density of water becomes maximum at

Question # 10

Which is not considered as pollutant

Question # 11

Biological oxygen demand (BOD) is associated with

Question # 12

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

Question # 13

Photo chemical smog contains ______ as main reactants

Question # 14

BOD means

Question # 15

The smog having high contents of SO2is

Question # 16

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg Toxic.

Question # 17

A single free chlorine redical can destroy ozone molecules upto:

Question # 18

Chloroform is carcinogenic:

Question # 19

Ocean contains part earth's water:

Question # 20

The percentage of SO2 produced by volcanoes is:

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 Rigid rocky crust earth upto a depth of 100 km is called:
A. Atmosphere
B. Hydrosphere
C. Lithosphere
D. All of these
2 Proxy acetyl nitrate (PAN) is an irritant to human beings and it affect
A. Nose
B. Stomach
C. Eyes
D. Ears
3
Major cause of SO2 on global scale is
A. Volcanoes
B. Electric sparks
C. Combustion
D. All
4 Smaller unit of biosphere is:
A. specie
B. ecosystem
C. plankton
D. troposphere
5 The pH range of the acid rain is
A. 6.5 - 6
B. Less than 5
C. 8 - 7.5
D. 7 - 6.5
6 Phenomenon of acid rains gain importance in:
A. 1930s
B. 1940s
C. 1950s
D. 1960s
7 Why a C - Cl bond breaks by uv light
A. Cl is most electronegative
B. Cl is volatile
C. C - Cl bond energy is smaller than that of C - H bond energy
D. Uv light provides energy which is sufficient to break C - Cl bond and not C - H bond
8 Which one of the following is not air pollutant gas
A. CO
B. CO2
C. NO
D. SO2
9 The temperature in the incineration of industrial and hazardons waster process had a range
A. 950 to 1300°C
B. 500 to 900°C
C. 250 to 500°C
D. 900 to 1000°C
10 Which of following is primary pollutants
A. N2O
B. PAN
C. H2SO4
D. None of these

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