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Question

Polyester consists of :
  1. repeating unit of ether
  2. repeating unit of caboxylic acid
  3. repeating units of ester
  4. repeating unit of hydroxide

A
repeating unit of caboxylic acid
B
repeating unit of ether
C
repeating units of ester
D
repeating unit of hydroxide
Solution
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Polyester is a category of polymers that contain ester in their main chain.
Polyesters are used to make bottles, films, holograms, filters, dielectric film for capacitors, film insulation for wire, and insulating tapes.
Hence, the correct option is C.

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