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Organic Chemistry: Polymers - SS3 Chemistry Past Questions and Answers - page 1

1

What is the primary factor that distinguishes a polymer from other macromolecules?

 

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A

Monomer composition

 

B

Molecular weight

 

C

Solubility

 

D

Chain length

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2

Which of the following polymers is an addition polymer?

 

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A

Polyethylene

 

B

Polyvinyl chloride (PVC)

 

C

Polypropylene

 

D

Polystyrene

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3

The process of converting monomers into polymers is known as:

 

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A

Polymerization

 

B

Oligomerization

 

C

Condensation

 

D

Isomerization

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4

Cross-linking in polymers leads to:

 

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A

Decreased mechanical strength

 

B

Increased flexibility

 

C

Decreased chemical stability

 

D

Enhanced mechanical strength

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5

What type of polymerization mechanism involves the generation of free radicals?

 

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A

Condensation polymerization

 

B

Addition polymerization

 

C

Copolymerization

 

D

Ring-opening polymerization

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6

The degree of polymerization (DP) is defined as:

 

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A

The ratio of monomer units to the total number of atoms in a polymer

 

B

The number of monomer units in a polymer chain

 

C

The ratio of monomer to solvent in a polymer solution

 

D

The length of a polymer chain in nanometers

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7

Which of the following is a thermosetting polymer?

 

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A

Polyethylene

 

B

Polypropylene

 

C

Bakelite

 

D

Polyvinyl chloride (PVC)

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8

The glass transition temperature (Tg) of a polymer is a measure of:

 

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A

Its ability to crystallise

 

B

Its resistance to thermal degradation

 

C

Its flexibility

 

D

Its transition from a hard and brittle state to a soft and rubbery state

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9

Which type of copolymer consists of alternating monomer units in the polymer chain?

 

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A

Random copolymer

 

B

Block copolymer

 

C

Graft copolymer

 

D

Alternating copolymer

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10

Biodegradable polymers are designed to:

 

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A

Undergo chemical cross-linking

 

B

Break down into natural byproducts through natural processes

 

C

Exhibit high thermal stability

 

D

Be resistant to microbial degradation

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