Which one of the following compounds shows the presence of intramolecular hydrogen bond?

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$H_{2} O_{2}$

HCN

Cellulose

Concentrated acetic acid

answer is C.

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Detailed Solution

Cellulose which shows the presence of intramolecular hydrogen bonding . This is due to the fact that the glucose monomers form straight chains and thus its polymeric structure crowd together showing intramolecular H-bonding.
However $H_{2} O_{2}$ also show intramolecular hydrogen but its is very weak due to large $(O - OH)$ bond angle which produce repulsions and thus dominant H- bonding is not seen .

Hence , the correct option is (C).

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