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

Which one is more toxic?

A. Fe

B. C

C. Hg

D. Ag

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

The toxic organic compounds and heavy metals and metalloids results in contamination of

A. surface water

B. ground water

C. both surface and ground water

D. neither surface nor ground waters

Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen

A. 2 days

B. 5 days

C. 6 days

D. 7 days

The eleventh concentration of metal cause clogs of gills in fish:

A. Al

B. He

C. Pb

D. Ca

Density of water becomes maximum at

A. 10°C

B. 4°C

C. 5°C

D. 12°C

A single chloride free radical can destroy the ozone molecules

A. 100

B. 100000

C. 10000

D. 10

The pH range of acid rain is?

A. 7-6.5

B. 6.5-6

C. 6-5.6

D. Less than 5

Which of the following is not a heavy industry?

A. Iron

B. Fertilize

C. Paper

D. None

In the atosphere, CO₂is about

A. 0.01%

B. 0.03%

C. 0.05%

D. 0.09%

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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

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

CFCs are mainly used in industries due to

Sulphate aerosols cause severe respiratory problems particularly among

Ozone is a gas having boiling point

The pH range of the acid rain is

An excellent source of energy without causing pollution is

Leather tanneries use big auantities of:

The pH range of acid rain is?

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

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

Amount of ozone in atmosphere is expressed in units:

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

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

Water is made disinfectant during purification of water to the step:

Coagulation removes suspended particles in ran water:

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

Components of environment is (in km) around the earth:

The amount of oxygen in the lithosphere is about

Hardness which can be removed by boiling is called

Chose a point which is not included in the components of environment

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

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Set 12

Set 13

Set 14

Set 15

Set 16

Set 17

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MCAT Chemistry Chapter 21 Important MCQ's

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