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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3pl020

Which statements about free radical addition polymerisation are correct?

AInitiation involves homolytic cleavage of the initiator to give radicals
BEvery propagation step regenerates a radical at the chain end
CTermination by disproportionation gives one saturated and one terminally unsaturated chain
DFree radical polymerisation of ethene gives HDPE, the linear polymer

Answer: A, B, C

Initiation, propagation (each addition gives a new radical) and disproportionation are as stated. Free radical ethene polymerisation gives branched LDPE; HDPE needs a Ziegler-Natta catalyst.

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