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Monomer units of Dacron polymer are:

1. ethylene glycol and phthalic acid
2. ethylene glycol and terephthalic acid
3. glycerol and terephthalic acid
4. glycerol and phthalic acid

Correct answer: ethylene glycol and terephthalic acid

Solution

Dacron is a type of polyester made from the polymerization of ethylene glycol and terephthalic acid, which combine to form long chains that give the material its strength and durability.

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