A) Examples are bakelite and melamine.
B) They are formed from bi- and tri-functional monomers.
C) They contain covalent bonds between various linear polymer chains.
D) They contain strong covalents bonds in their polymer chains.
Correct Answer: D
Solution :
Cross linked or network polymers are formed from bi-functional and tri-functional monomers and contain strong covalent bonds between various linear polymer chains, e.g. bake lite, melamine etc. Option [d] is not related to cross-linking. So option [d] should be the correct option.
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