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

Density of water becomes maximum at

Question # 2

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

Question # 3

Three elements needed for the healthy growth of plants are

Question # 4

Industrial effluents have toxic synthetic organic compounds as well as heavy metals like

Question # 5

Water bodies are included in:

Question # 6

Part of fresh water consumed in domestic purpose:

Question # 7

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

Question # 8

Biochemical oxygen demand (BOD) is the capacity of organic matter in natural water to consume oxygen with in a period of

Question # 9

The pH of the rain water in areas where acid rain is the cause of pollution may be

Question # 10

Leather tanneries use big auantities of:

Question # 11

An excellent source of energy without causing pollution is

Question # 12

Proxy acetyl nitrate (PAN) is an irritant to human beings and it affect

Question # 13

Volcanoes produce SO2:

Question # 14

Carbon Monoxide is:

Question # 15

What is the cause of water pollution

Question # 16

Alkali metals react viotlently with halogens:

Question # 17

Site of land for landfill is selected based upon.

Question # 18

Choose the correct statements

Question # 19

Ozone acts as:

Question # 20

Commonly used coagulants are ions of:

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 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 non reactive chemically
2 Volcanoes produce SO2:
A. 47%
B. 57%
C. 67%
D. 77%
3 The gases in the atmosphere are essential for sustaining life on earth. Thus oxygen is required for breathing. What for is carbon dioxide required
A. To help plant to under go photosynthesis
B. To destroy nitrogen oxide from the atmosphere
C. To help to clean the atmosphere
D. To help in fixing of bacteria
4 The yellow color present in the photo chemical smog is due to presence of the
A. Carbon dioxide
B. Nitrogen dioxide
C. Chlorine
D. All
5 BOD is the oxygen demand with in day(s):
A. Four
B. Two
C. Three
D. Five
6 Water is made disinfectant during purification of water to the step:
A. aeration
B. coagulation
C. chlorination
D. treatment
7 Components of environment is (in km) around the earth:
A. 10 km
B. 100 km
C. 1000 km
D. 1500 km
8 Which gas is not a constituent of atmosphere?
A. Xe
B. O3
C. H2
D. F2
9 Ratio of hydrogen (H) and oxygen (O) in water molecule by volume is
A. 2: 1
B. 1: 2
C. 3: 1
D. 4: 1
10 Chemicals used to kill herbs are:
A. Herbicides
B. Insecticides
C. Pesticides
D. Fungicides

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