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Question 1

Teflon

Answer 1

Polytetrafluoroethylene, PTFE):
Structure: Made entirely of carbon-fluorine (
C−F) bonds, forming a non-stick coating.
Uses:
Commonly used in non-stick cookware.
Chemically inert and resistant to high temperatures.

Question 2

Poly(vinyl chloride) (PVC):

Answer 2

Structure: Contains alternating
CH2- and CHCl- groups in a polymer chain.
Uses:
Widely used in films, pipes, and electrical insulation.
Durable, lightweight, and resistant to corrosion.

Question 3

CFC-11 (Chlorofluorocarbon,
CFCl3 , Freon-11):

Answer 3

Structure: Contains carbon, chlorine, and fluorine atoms.
Uses:
Previously used as a refrigerant and propellant.
Banned due to its role in ozone layer depletion.

Question 4

DDT (Dichlorodiphenyltrichloroethane):

Answer 4

Structure: Contains two benzene rings and three chlorine atoms attached to a central carbon atom.
Uses:
Historically used as an insecticide.
Banned in many countries due to its environmental persistence and toxicity.

Question 5

What is the primary component of Teflon?

Answer 5

Answer: Carbon-fluorine (
C−F bonds.

Question 6

What is a common use of Teflon?

Answer 6

Answer: Non-stick coatings in cookware.

Question 7

What is the repeating unit in PVC?

Answer 7

Answer:
CH2−CHCl.

Question 8

Name three applications of PVC.

Answer 8

Answer: Films, pipes, and electrical insulation.

Question 9

What is the chemical formula for CFC-11?

Answer 9

Answer:
CFCl3
​
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Question 10

Why was the use of CFC-11 banned?

Answer 10

Answer: It contributes to ozone layer depletion.