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Engineering Chemistry Unit III: Polymers Quiz

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Engineering Chemistry Unit III: Polymers Quiz

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Questions and Answers

What is the repeated unit of a polymer called?

Monomer

What is the number of monomeric units contained in a polymer called?

Degree of polymerization

Define oligo polymers.

Polymers whose degree of polymerization is less than 600.

What are high polymers?

Polymers with a degree of polymerization more than 600. Signup and view all the answers

What is functionality in the context of polymers?

Number of bonding sites in a monomer. Signup and view all the answers

What is a bi-functional monomer?

A monomer with two reactive sites. Signup and view all the answers

What are the two main categories of polymers based on origin?

Natural polymers and synthetic polymers Signup and view all the answers

Give an example of a linear polymer.

Polythene Signup and view all the answers

What are the characteristics of cross-linked polymers?

Hard, rigid, and brittle because of the network structure. Signup and view all the answers

What is the difference between homo polymers and co-polymers?

Homo polymers consist of identical monomeric units, while co-polymers are made up of different monomers. Signup and view all the answers

Name a natural polymer.

Starch Signup and view all the answers

What are the uses of polymers?

Non-toxic & safe to use, low densities, good mechanical strength, resistant to corrosion, thermal & electrical insulators, easily molded and fabricated, possess esthetical colors. Signup and view all the answers

What are branched chain polymers?

Polymers in which the monomers are joined to form long chains with side chains or branches of different lengths. Signup and view all the answers

Give an example of a synthetic polymer.

PVC (Polyvinyl chloride) Signup and view all the answers

What is a tri functional monomer?

A monomer with three reactive sites. Signup and view all the answers

What are the characteristics of linear polymers?

Well packed, high densities, high tensile strength, and high melting point. Signup and view all the answers