Question

# Dacron is a polymer of:A. Ethylene glycol and formaldehydeB. Ethylene glycol and phenolC. Ethylene glycol and phthalic acidD. Ethylene glycol and terephthalic acid

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Hint: Think about the common name of dacron; terylene. It is used regularly in the production of various fabrics. The name will give you an idea about the unit molecules involved in the monomeric unit.

Here, we can see that one ${{H}_{2}}O$ molecule is lost to form the unit. Thus, it is called a condensation reaction.