Question

An organic compound with the molecular formula \(\text{C}_6\text{H}_6\text{O}\) dissolves in NaOH, gives a characteristic colour with neutral \(\text{FeCl}_3\) and on treatment with bromine water gives a tri bromo derivative. Which is that compound among the following?

• A. Alcohol
• B. Ether
• C. Ketone
• D. Phenol

Hint:

Phenol dissolves in NaOH, gives violet colour with FeCl3 and gives 2,4,6-tribromophenol with bromine water.

Answer 1

The Correct Option is D

Step 1: Use the formula:
$\text{C}_6\text{H}_6\text{O}$ has 4 degrees of unsaturation, which fits an aromatic ring with an -OH group.

Step 2: Check the properties:
Acidic enough to dissolve in NaOH, violet with $\text{FeCl}_3$, and fast tribromination all point to the phenolic ring with -OH.

Step 3: Pick:
Phenol, option D.

Final Answer:
Acidity, the FeCl3 colour and tribromination all identify phenol. \[ \boxed{\text{(D) }\text{Phenol}} \]