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JEE Main 202125 JulyMorning Shift
Exam
JEE Main
Year
2021
Date
25 July
Shift
Morning Shift
Subject
Chemistry
Chapter
Polymers

JEE Main 2021 · 25 July · Morning Shift · Chemistry · Polymers

is a repeating unit for :

is a repeating unit for :

is a repeating unit for :

Options

  1. ANovolac
  2. BBuna-N
  3. CAcrilan
  4. DNeoprene

Correct answer

A. Novolac

Step-by-step solution

Phenol+HCHO→H+Novolac (Given structure)→PolymerisationBakelite(Cross linked polymer)\text{Phenol} + HCHO\overset{{H}^{+}}{\to}\text{Novolac (Given structure)}\overset{\text{Polymerisation}}{\to}\text{Bakelite(Cross linked polymer)}

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