NEET Solved Paper 2014 Question 35
Question: Which one of the following is an example of a thermosetting polymer? [AIPMT 2014]
Options:
A) $ -(CH _2-\underset{\underset{Cl}{\mathop{|}},}{\mathop{C}},=CH-CH _2){- _{n}} $
B) $ -(CH _2-\underset{\underset{Cl}{\mathop{|}},}{\mathop{C}},H){- _{n}} $
C) $ -(\overset{\overset{H}{\mathop{|}},}{\mathop{N}},-{{(CH _2)}_6}-\overset{\overset{H}{\mathop{|}},}{\mathop{N}},-\overset{\overset{O}{\mathop{||}},}{\mathop{C}},-{{(CH _2)}_4}-\overset{\overset{O}{\mathop{||}},}{\mathop{C}},){- _{n}} $
D) 
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Answer:
Correct Answer: C
Solution:
Novolac, a condensation polymer of phenol and formaldehyde is a thermosetting polymer. Neoprene rubber
$ -[CH _2-\underset{\underset{,Cl}{\mathop{|}},}{\mathop{C}},=CH-CH _2]{- _{n}} $ and $ PVC-[CH _2-\underset{\underset{Cl}{\mathop{|}},}{\mathop{CH}},]{- _{n}} $
are thermoplastic polymers while nylon-66
$ -[NH-{{(CH _2)}_6}-NH-\overset{\overset{O}{\mathop{||}},}{\mathop{C}},-(CH _2)-\overset{\overset{O}{\mathop{||}},}{\mathop{C}},-{{(CH _2)}_4}-\overset{\overset{O}{\mathop{||}},}{\mathop{C}},]{- _{n}} $
is a polyamide which is commonly known as fibre.
BETA
