Question

Which of the following molecules show the presence of intramolecular hydrogen bonding?

• A. Cellulose
• B. $\mathrm{HCN}$
• C. Concentrated Acetic Acid
• D. ${\mathrm{H}}_2{\mathrm{O}}_2$

Answer 1

The correct option is A

Cellulose

Explanation of the correct option:

(A) Cellulose

• Cellulose is consist of cellobiose units where strong intracellular hydrogen bonds are present, because of which it is difficult to dissolve cellulose in a common solvent.
• In intramolecular hydrogen bonding, hydrogen bonds are present between two functional groups of the same molecule.
• For intramolecular hydrogen bonding, both a hydrogen donor and a hydrogen acceptor must be present within one molecule,

Explanation of incorrect options:

(B) $\mathrm{HCN}$ contain intermolecular hydrogen bonding where bonding occurs between two neighboring molecules.

(C) Concentrated acetic Acid contains intermolecular hydrogen bonding.

(D) ${\mathrm{H}}_2{\mathrm{O}}_2$ also contain intermolecular hydrogen bonding.

Hence, the correct option is A i.e. Cellulose shows the presence of Intramolecular hydrogen bonding.