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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3pl005

In which of the following is the main chain (backbone) made of carbon atoms only?

APoly(methyl methacrylate)
BNylon 6,6
CNatural rubber
DTerylene

Answer: A, C

PMMA and natural rubber are addition polymers with all-carbon backbones. Nylon 6,6 has amide

N

in the chain and terylene has ester oxygen atoms.

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