Question

What is the product name (X)? 

• A. Phenol sulfonic acid
• B. Naphthalene sulfonic acid
• C. Polyhydroxy sulfonic acid
• D. Benzenesulfonic acid

Hint:

The reaction of benzene with sulfuric acid forms benzenesulfonic acid, which is an electrophilic aromatic substitution.

Answer 1

The Correct Option is D

Step 1: Understanding the Reaction 
The given reaction is an electrophilic aromatic substitution where a benzene ring reacts with sulfuric acid \(( H_2SO_4 )\). 

Step 2: Mechanism of the Reaction 
- The sulfuric acid \(( H_2SO_4 )\) is acting as a sulfonating agent, introducing the sulfonic group \(( -SO_3H )\) onto the benzene ring.
- The reaction leads to the formation of benzenesulfonic acid where the sulfonic group is attached to the benzene ring. 

Step 3: Conclusion 
The product (X) of this reaction is benzenesulfonic acid.