Question

Intramolecular hydrogen bonding is present in

• A.
• B.
• C.
• D. HF

Answer 1

The Correct Option is A

Step 1: Define Intramolecular Hydrogen Bonding

Intramolecular hydrogen bonding is the formation of a hydrogen bond between a hydrogen atom and an electronegative atom (e.g., oxygen or nitrogen) within the same molecule. This is distinct from intermolecular hydrogen bonding, which occurs between different molecules.

Step 2: Analyze the Provided Options

Option (1): The molecule \( C_6H_4NO_2OH \) (hydroxy-nitrobenzene) possesses a hydroxy (-OH) group capable of forming an intramolecular hydrogen bond with the nitro (-NO₂) group, resulting in a stable structure.

Options (4) and (2): These molecules lack the appropriate structural geometry for intramolecular hydrogen bonding; they are more prone to intermolecular hydrogen bonding.

Option (3): Hydrogen bonding in HF is exclusively intermolecular, not intramolecular.

Step 3: Determine the Correct Option

Based on the analysis, the correct answer is: Option (1)