A) Without proper control, atactic polypropylene is formed
B) Use of Ziegler-Natta catalyst results in isotactic polypropylene
C) During polymerisation, a linear unbranched. crystalline polymer is usually obtained
D) During polymerisation, a secondary free radical Is produced in every step
Correct Answer: C
Solution :
Chain branching always occur during olefenic polymerisation due to abstraction of some H-radical from the growing polymer chain.
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