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JEE Main 202125 FebruaryMorning Shift
Exam
JEE Main
Year
2021
Date
25 February
Shift
Morning Shift
Subject
Chemistry
Chapter
Polymers

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

Which statement is correct?

Which statement is correct?Which statement is correct?

Options

  1. ASynthesis of Buna-SS needs nascent oxygen.
  2. BBuna-SS is a synthetic and linear thermosetting polymer.
  3. CBuna-NN is a natural polymer.
  4. DNeoprene is an addition copolymer used in plastic bucket manufacturing.

Correct answer

A. Synthesis of Buna-SS needs nascent oxygen.

Step-by-step solution

Buna-S is an elastomer

Buna-N is a synthetic polymer

Buna-S is polymerised by addition polymerisation method which needs radical initiator for chain propagation step. Nascent oxygen can be used as an Radical initiator.

Neoprene is a synthetic rubber.

Which statement is correct?

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