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?
Options
- ASynthesis of Buna- needs nascent oxygen.
- BBuna- is a synthetic and linear thermosetting polymer.
- CBuna- is a natural polymer.
- DNeoprene is an addition copolymer used in plastic bucket manufacturing.
Correct answer
A. Synthesis of Buna- 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.