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B
buna-S
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C
Polyester
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D
polyamide
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Solution
The correct options are A Polyethene B buna-S
Homopolymers are addition polymers containing repeating units made from only one kind of monomer. For example, polyethene is a homopolymer whose monomer is ethene.
Copolymers are also addition polymers. However, they contain repeating units made from two or more kinds of monomers. For example, buna-S is a copolymer whose monomers are styrene and 1,3-butadiene.