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Classification of polymers
JEE Main level
Single correct option
Difficulty 2 of 3
pl127
In the free radical addition polymerisation of a vinyl monomer, the initiation step involves
A
heterolytic cleavage of the initiator to give ions that add to the monomer
B
nucleophilic attack of an organometallic compound on the monomer
C
homolytic cleavage of the initiator (for example benzoyl peroxide) to give free radicals that add to the monomer
D
protonation of the monomer by a strong acid
Answer: C
Benzoyl peroxide on heating splits homolytically at the O-O bond into radicals. These radicals add to the C=C of a monomer to start the chain.
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