Question

2-Hydroxy benzoic acid on heating

Answer 1

Phenol

Answer 2

Upon heating, 2-Hydroxy benzoic acid (salicylic acid) undergoes decarboxylation. The carboxylic acid group (-COOH) is eliminated as carbon dioxide (CO2), and a hydrogen atom replaces it on the benzene ring. The hydroxyl group (-OH) remains attached to the benzene ring.

The reaction can be represented as:

$$\text{C}_6\text{H}_4(\text{OH})\text{COOH} \xrightarrow{\text{Heat}} \text{C}_6\text{H}_5\text{OH} + \text{CO}_2$$

Reactant: 2-Hydroxy benzoic acid (Salicylic acid) c1ccc(C(=O)O)c(O)c1

Product: Phenol c1ccccc1O

The product formed is Phenol.

Explanation of the Solution:

2-Hydroxy benzoic acid, also known as salicylic acid, undergoes decarboxylation when heated. This reaction involves the removal of the carboxylic acid group (-COOH) as carbon dioxide (CO2), leading to the formation of phenol. The presence of the hydroxyl group ortho to the carboxylic acid group facilitates this decarboxylation.

Answer:

The product formed is Phenol.