Please explain...?

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1 Answer
Apr 28, 2018

The answer is (a) 1.

Explanation:

Terylene is a condensation polymer formed by the reaction of ethylene glycol and terephthalic acid.

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The polymer chain may consist of 1000 repeating units, but it takes one molecule of ethylene glycol and one molecule of terephthalic acid to form each repeating unit.

Thus, no matter what the length of the chain is, there is always one mole of ethylene glycol per mole of terephthalic acid.