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Subject - Chemistry:

Basics

MCQ - 53-2239

Question:

Which of the following is a repeat unit in a condensation polymer?

  1. −CH2CHCI−
  2. -CO-C6H4-CO-O-CH2-CH2-O-
  3. −CH2CH2CH2O−
  4. -CO-C6H4-CO-O-CH2-CH2-O-

Correct Answer: B

Explanation:

In many condensation polymers the repeat unit contains two structural units related to the co-monomers which have been polymerized. For example, in polyethylene terephthalate (PET or "polyester"), the repeat unit is -CO-C6H4-CO-O-CH2-CH2-O-.

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