A) preparing and purifying the nylon salt in a separate stage
B) by using excess of adipic acid or hexamethylene diamine
C) by using excess of pressure in the process
D) by the choice of appropriate catalysts
Correct Answer: C
Solution :
In the manufacture of nylon-66, balance of functional group is ensured by using excess of pressure in the process. Nylon-66 is a condensation polymer and prepared by the reaction of adipic acid and hexamethylene- diamine.
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