Uses Of Carboxylic Acids

dilute solution of acetic acid is known as vinegar. Vinegar can be obtained by the fermentation of ethyl alcohol in the presence of enzyme acetobactor.

Step 1: Identifying the reaction.
When acetic anhydride reacts with a compound in the presence of sulfuric acid, the reaction forms an ester or an acid derivative. To form aspirin, the carboxylic acid group ( ) on the aromatic ring reacts with the acetic anhydride.

Step 2: Explanation of the options.
- (1) : This is the aldehyde group, and it does not form aspirin in the given reaction.
- (2) : This is the correct option. The carboxylic acid group forms aspirin upon reaction with acetic anhydride.
- (3) : This hydroxyl group does not react to form aspirin in the same manner.
- (4) : The amino group does not form aspirin in this reaction.

Step 3: Conclusion.
The correct answer is (2).

Step 1: Understanding the Concept:
VSEPR theory: Repulsion order: lp-lp>lp-bp>bp-bp.
Step 2: Detailed Explanation:
Lone pair electrons are closer to nucleus and occupy more space, causing greater repulsion between two lone pairs.
Step 3: Final Answer:
Thus, maximum repulsive interaction is lp - lp.