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

Water which forms scum with soap is called

Question # 2

Rigid rocky crust earth upto a depth of 100 km is called:

Question # 3

Three elements needed for the healthy growth of plants are

Question # 4

Property due to which water acts as a universal solvent is

Question # 5

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

Question # 6

In water the most important oxidizing agent is dissolved molecular oxygen which ranges form

Question # 7

What change in plants indicates toxic effect of SO2

Question # 8

Smaller unit of biosphere is:

Question # 9

Water is essential for life on

Question # 10

Exposure to CO results in

Question # 11

What is component of environment?

Question # 12

The amount of oxygen in the lithosphere is about

Question # 13

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

Question # 14

Petroleum or crude oil is a complex mixture of compounds mainly:

Question # 15

Dissolved impurities of potable water can be separated by the process of

Question # 16

What is the morality of a solution containing 15g of urea is 500cm3 of solution?

Question # 17

Which one of the pollutants of automobile exhausts affects the nervous system or produces mental diseases

Question # 18

Polar ice caps can melt due to

Question # 19

Ocean contains part earth's water:

Question # 20

Amount of ozone in atmosphere is expressed in units:

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MCAT Chemistry Chapter 21 Important MCQ's

Sr.# Question Answer
1 A single chloride free redical can destroy bow many ozene molecules?
A. 100
B. 100000
C. 10000
D. 10
2 Fresh water of total earth water is:
A. 1%
B. 2%
C. 3%
D. 4%
3 Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water
A. low value
B. higher value
C. both values
D. none of these
4 Ozone is a gas having boiling point
A. Unstable
B. High
C. Low
D. Moderate
5 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
A. live stock waste
B. oil leaks and spills
C. disposal of industrial effluents
D. rain
6 Coagulation removes suspended particles in ran water:
A. 60%
B. 70%
C. 80%
D. 90%
7 Rigid rocky crust earth upto a depth of 100 km is called:
A. Atmosphere
B. Hydrosphere
C. Lithosphere
D. All of these
8 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
A. Blow air
B. Add Na2CO3
C. Use a specially made sorbent having fluorine trapped in it
D. Use a sorbent having Al2O3trapped in it
9 Ozone is an allotropic form of:
A. Carbon
B. Phosphorus
C. Oxygen 
D. Sulfur 
10 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

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