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JEE Main levelSingle correct optionDifficulty 2 of 3pl096

In nylon 2-nylon 6 the numbers 2 and 6 refer to

Athe number of carbons in a diamine and a diacid
Bthe numbers of amide and ester groups in one unit
Cthe number of $CH X_{2}$ groups in each monomer
Dthe number of carbon atoms in each of the two amino acid monomers, glycine and 6-aminohexanoic acid

Answer: D

The naming follows the carbon count of each amino acid: glycine has 2 carbons and 6-aminohexanoic acid has 6. The numbers are not counts of

CH X_{2}

groups, since glycine has one and the other has five.

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