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JEE Main · 2022 · 29 Jun 2022 · Shift 2 · Polymers

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Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Dacron is an example of polyester polymer.

Reason R: Dacron is made up of ethylene glycol and terephthalic acid monomers.

In the light of the above statements, choose the most appropriate answer from the options given below.
  1. (A)Both and are correct and is the correct explanation of .✓ Correct
  2. (B)Both and are correct but is NOT the correct explanation of .
  3. (C) is correct but is not correct.
  4. (D) is not correct but is correct.

Answer: (A)

Solution

Dacron, also called Terylene, is a polyester formed by the condensation of ethylene glycol with terephthalic acid, the ester linkages between these two monomers being exactly what makes it a polyester. So the assertion that Dacron is a polyester is correct, the reason naming its monomers as ethylene glycol and terephthalic acid is correct, and that reason is precisely why the assertion holds, making it the correct explanation of the assertion.

JEE Main · 2022 · 29 Jun 2022 · Shift 2 · Single correct option

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