A) high molecular weight polymers are formed all at once
B) lower molecular weight polymers are formed all at once
C) molecular weight of polymer rises throughout the reaction
D) have no specific relation to their molecular weight
Correct Answer: C
Solution :
The process of condensation polymerisation takes place in the following manner. \[\underset{momomers}{\mathop{A+B}}\,\xrightarrow{Condense}\underset{\text{dimer}}{\mathop{A-B}}\,\] \[A-B+A\xrightarrow{Condense}A-B-A\] \[A-B-A+B\xrightarrow{{}}A-B-A-B\] In this process, no initiator is required and it is also called step growth polymerisation. Here, molecular weight of polymer rises throughout the reaction.
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