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	Volcanoes produce SO₂:	A. 47% B. 57% C. 67% D. 77%
2	Ecosystem is a smaller unit of	A. Hydrosphere B. Lithosphere C. Biosphere D. Atmosphere
3	The water is considered to be polluted when the concentration of oxygen in it is	A. 6 - 9ppm B. 6 ppm C. 8 ppm D. Less than 4pm
4	Which is not the affect of polluted air on environment	A. acid rain B. smog C. ozone D. global warming
5	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
6	Petroleum or crude oil is a complex mixture of compounds mainly:	A. benzene B. minerals C. hydrocarbons D. phenols
7	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
8	The concentration of dissolved molecular oxygen in water which acts as the most important oxidizing agent ranges from	A. 2 ppm - 6 ppm B. 2 ppm - 4 ppm C. 4 ppm - 8 ppm D. 2 ppm - 3 ppm
9	Which of the following factors is not used to determine the quality of water	A. COD B. BOD C. DO D. Available chlorine
10	Nitrogen percentage in atmosphere is:	A. 76% B. 77% C. 78% D. 79%

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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

How much pesticides have been synthesized at present?

BOD means

Heat balance of earth is maintained by

Ozone in most of the tropical regions acts as a pollutant and cause

Hydrosphere covers the surface of erath:

Surface and ground water sources are contaminated by various human activities which of the followings is not a human activity that causes contamination in fresh water

Organic pollutants in water are measured by

Chemicals used to kill insects are:

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

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

Test of incomplete combustion of petrol in the presence of

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

What is the effect of polluted air on environment

Fungicides are the pesticides which:

The % of CO2in the atmosphere is

In the atmosphere, O2is about

Ozone layer is present in

What change in plants indicates toxic effect of SO2

A pollutant affects

The 95.5% mass of Lithoshone is made of 11 elements i,e O2, Si, Al, Fe, Ca, Na, K, Mg, Ti, H2and P. Which element is present in trace amount

Prepare Complete Set Wise MDCAT Chemistry Chapter 21 Environmental Chemistry Online Test MCQs Online With Answers

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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

Test Questions

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The % of CO₂in the atmosphere is

In the atmosphere, O₂is about

What change in plants indicates toxic effect of SO₂

The 95.5% mass of Lithoshone is made of 11 elements i,e O₂, Si, Al, Fe, Ca, Na, K, Mg, Ti, H₂and P. Which element is present in trace amount