Which of the following polymers does not cont | vedclass

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(A) The chemical structures of the given polymers are as follows:$1$. $PAN$ (Polyacrylonitrile): The monomer is acrylonitrile,$CH_2=CH-CN$. The polyme

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$PAN$

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(A) The chemical structures of the given polymers are as follows:$1$. $PAN$ (Polyacrylonitrile): The monomer is acrylonitrile,$CH_2=CH-CN$. The polymer structure is $[-CH_2-CH(CN)-]_n$. It contains a nitrogen atom in the cyano group $(-CN)$.$2$. Nylon $6$: It is a polyamide formed from caprolactam. Its structure is $[-CO-(CH_2)_5-NH-]_n$. It contains nitrogen in the amide linkage $(-CONH-)$.$3$. Nylon $6,6$: It is a polyamide formed from hexamethylenediamine and adipic acid. Its structure is $[-NH-(CH_2)_6-NH-CO-(CH_2)_4-CO-]_n$. It contains nitrogen in the amide linkage.$4$. Nylon $2-6$: It is a polyamide copolymer of glycine and aminocaproic acid. It contains nitrogen in the amide linkage.Wait,re-evaluating the question: $PAN$ (Polyacrylonitrile) contains a nitrogen atom in the $-CN$ group. Let us re-examine the options. All listed polymers contain nitrogen. However,in the context of typical chemistry problems,$PAN$ is often contrasted with polyamides. If the question specifically asks for the absence of an $N$ atom,there might be a typo in the question or options. Given the options,all contain $N$. If we assume the question implies the absence of an amide linkage $(-CONH-)$,then $PAN$ is the correct answer as it contains a nitrile group $(-CN)$ instead of an amide group.

Which of the following polymers does not contain an $N$ atom?

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