Understanding Polymers

The video tutorial introduces polymers, large macromolecules made of monomers, and explains their properties and structures. It covers natural polymers like DNA and proteins, and synthetic polymers such as polyethylene and PVC. The video also delves into polymerization mechanisms, including radical, cationic, and anionic polymerization, highlighting their practical applications.

What is the primary factor that determines the physical properties of a polymer?

• The identity of the end groups

• The size of the polymer

• The structure of the repeating units

• The method of polymerization

Which of the following is a monomer of DNA?

• Glucose

• Ethylene

• Nucleotides

• Amino acids

Proteins are polymers made up of which type of monomers?

• Amino acids

• Nucleotides

• Ethylene

• Monosaccharides

What is the repeating unit of polyethylene derived from?

• Styrene

• Vinyl chloride

• Propylene

• Ethylene

Polyvinyl chloride (PVC) is formed from the polymerization of which monomer?

• Styrene

• Ethylene

• Vinyl chloride

• Propylene

In radical polymerization, what is the role of the initiator?

• To act as a catalyst

• To generate free radicals

• To break the polymer chain

• To stabilize the polymer

What type of polymerization involves the use of an electrophile to initiate the reaction?

• Condensation polymerization

• Radical polymerization

• Cationic polymerization

• Anionic polymerization

Which group can stabilize a positive charge in cationic polymerization?

• Electron-withdrawing group

• Electron-donating group

• Radical group

• Neutral group

In anionic polymerization, what is used to initiate the reaction?

• Nucleophile

• Electrophile

• Catalyst

• Radical

Which type of polymerization is initiated by a nucleophile?

• Condensation polymerization

• Cationic polymerization

• Radical polymerization

• Anionic polymerization