Verified Solution • 2025–26 Session moderate

QJEEM21Ch0001: JEE Main 2021 Chemistry - Class 12 JEEM21Ch0001 Solution: Which statement is correct?

Which statement is correct?

Multiple Choice Options

  • A Synthesis of Buna-S needs nascent oxygen.
  • B Buna-S is a synthetic and linear thermosetting polymer.
  • C Buna-N is a natural polymer.
  • D Neoprene is an addition copolymer used in plastic bucket manufacturing.

Step-by-Step Verified 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.

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