acetoacetic acid gives ferric chloride test which is a typical test of phenol
The Correct Answer and Explanation is :
The statement that acetoacetic acid gives the ferric chloride test, which is a typical test for phenol, is incorrect. Acetoacetic acid does not typically give a positive result in the ferric chloride test. This test is specifically used to detect phenols, which have a hydroxyl group (-OH) attached to an aromatic ring.
Ferric Chloride Test for Phenols:
The ferric chloride test is used to detect phenolic compounds, which include compounds like phenol, aromatic alcohols, and some other aromatic derivatives. The test is based on the formation of a colored complex when ferric chloride (FeCl₃) is added to a solution containing a phenol.
- Mechanism: Phenols contain a hydroxyl group (-OH) attached to a benzene ring. When ferric chloride (FeCl₃) is added to a solution of phenol, the iron(III) ion (Fe³⁺) interacts with the phenol, forming a colored complex. The color of this complex can range from purple to blue, green, or red, depending on the structure of the phenol.
- Result: A positive ferric chloride test indicates the presence of a phenol group, as the iron(III) ions form a complex with the phenol’s hydroxyl group.
Acetoacetic Acid:
Acetoacetic acid (CH₃COCH₂COOH) is a beta-keto acid and does not contain the phenolic -OH group. It contains a carbonyl group (C=O) and a beta-keto group but does not react with ferric chloride in the same way that phenols do. Instead, acetoacetic acid undergoes other reactions such as those involving its carbonyl group, but it does not give a positive ferric chloride test.
Conclusion:
While acetoacetic acid is an organic compound that contains functional groups like carbonyl, it is not a phenol and does not typically give a positive ferric chloride test. The ferric chloride test is specific for phenolic compounds, not for acids like acetoacetic acid.