MDCAT Chemistry Chapter 21 online mcq test with answers for chapter 21 (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.

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.#	Question	Answer
1	Synthetic organic pesticides formulated nowadays are more then:	A. One thousand B. Ten thousand C. Two thousands D. Twenty thousand
2	Chlorofluorocarbon, CF₂Cl₂, plays an effective role in removing O₃(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone
3	The rigid rocky part of earth crust called lithosphere extends upto a depth of:	A. 10 km B. 100 km C. 1000 km D. 1500 km
4	Factors affecting quality of water:	A. D.O B. BOD C. COD D. a,b,c
5	Acidification of soil can leach metal:	A. Al B. Hg C. Pb D. Ca
6	Water in swimming pools is purified by adding	A. Sodium B. Chlorine C. Phosphorus D. Potassium
7	Amount of ozone in atmosphere is expressed in units:	A. Kilograms B. cm C. molarity D. DU
8	Lead pollution is mainly due to	A. Metallic pollution B. Space pollution C. Acid rain D. Cd pollution
9	Term ozone hole is used for depletion of ozone during months of:	A. Jan-Feb B. March - Sep C. Sep- Nov D. Dec-Feb
10	A chemist says that glass must be a super cooled liquid. the reason that he might have in his mind is that glass has:	A. Definite shape B. Definite volume C. Crystalline structure D. No crystalline structure

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MDCAT Chemistry Chapter 21 MCQ Test With Answer for (Environmental Chemistry)

MCQ's Test For MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test

In the atmosphere, O2is about

Ratio of hydrogen (H) and oxygen (O) in water molecule by volume is

Ozone layer is present in

Which factor is helping to reduce the environment pollution

The reason of acid rains is

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Chemical equilibrium involving reactants and products in more than one phase is called:

How can heavy metal contamination like the presence of Hg or Pb may be removed from the soil

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

The ozone depletion in the stratophere is mainly due to the reaction of ozone with

Smaller unit of biosphere is:

Pathogens in raw water are killed in step:

Boron, aluminium, gallium, indium and thallium belong to group lll-A of the periodic table show a decrease with increasing relative atomic mass:

What is component of environment?

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

Leachate contains:

To purify water which has mud dissolved in it, a substance which coagulates the suspended particles is used.The coagulant may be

A single free chlorine redical can destroy ozone molecules upto:

Photo chemical smog contains ______ as main reactants

Commonly used coagulants are ions of:

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Top Scorers Of MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test MCQ`s Test

MCAT Chemistry Chapter 21 Important MCQ's

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In the atmosphere, O₂is about

To purify water which has mud dissolved in it, a substance which coagulates the suspended particles is used.
The coagulant may be