(a)
Interpretation:
True or false.
Ethylene contains one carbon-carbon double bond, and polyethylene contains many carbon-carbon double bonds.
Concept Introduction:
Procedures where single molecules or monomers such as hydrocarbons and amino acids bond to form
- Natural polymers − These polymers consist rubber, cellulose and deoxyribonucleic acid (DNA).
- Manmade or artificial polymer − These polymers are found within PVC i.e. polyvinyl chloride and other plastic.
(b)
Interpretation:
True or false.
All c-c bond angles in both LDPE and HDPE are approximately 1200.
Concept Introduction:
Procedures where single molecules or monomers such as hydrocarbons and amino acids bond to form polymers is known as polymerization. Below are the two types of polymers:
- Natural polymers − These polymers consist rubber, cellulose and deoxyribonucleic acid (DNA).
- Manmade or artificial polymer − These polymers are found within PVC i.e. polyvinyl chloride and other plastic.
(c)
Interpretation:
True or false.
Low-density polyethylene is a highly branched polymer.
Concept Introduction:
Procedures where single molecules or monomers such as hydrocarbons and amino acids bond to form polymers is known as polymerization. Below are the two types of polymers:
- Natural polymers − These polymers consist rubber, cellulose and deoxyribonucleic acid (DNA).
- Manmade or artificial polymer − These polymers are found within PVC i.e. polyvinyl chloride and other plastic.
(d)
Interpretation:
True or false.
High density polyethylene consists of carbon chains with little branching.
Concept Introduction:
Procedures where single molecules or monomers such as hydrocarbons and amino acids bond to form polymers is known as polymerization. Below are the two types of polymers:
- Natural polymers − These polymers consist rubber, cellulose and deoxyribonucleic acid (DNA).
- Manmade or artificial polymer − These polymers are found within PVC i.e. polyvinyl chloride and other plastic.
(e)
Interpretation:
True or false.
The density of polyethylene polymers is directly related to the degree of chain branching, the lower the density of the polymer.
Concept Introduction:
Procedures where single molecules or monomers such as hydrocarbons and amino acids bond to form polymers is known as polymerization. Below are the two types of polymers:
- Natural polymers − These polymers consist rubber, cellulose and deoxyribonucleic acid (DNA).
- Manmade or artificial polymer − These polymers are found within PVC i.e. polyvinyl chloride and other plastic.
(f)
Interpretation:
True or false.
PS and PVC are currently recycled.
Concept introduction:
Procedures where single molecules or monomers such as hydrocarbons and amino acids bond to form polymers is known as polymerization. Below are the two types of polymers:
- Natural polymers − These polymers consist rubber, cellulose and deoxyribonucleic acid (DNA).
- Manmade or artificial polymer − These polymers are found within PVC i.e. polyvinyl chloride and other plastic.

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Chapter 12 Solutions
Introduction to General, Organic and Biochemistry
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