Liebermann's test is answered by

Options

A. Aniline
B. Methylamine
C. Ethyl benzoate
D. Phenol

Answer

**Step-by-Step Solution:**

1. **Understanding Liebermann's Test**: Liebermann's test is a chemical test used to identify the presence of phenolic compounds. It specifically detects phenols through a reaction that produces a colored compound.

2. **Identifying the Compounds**: The question provides four options: Aniline, Ethyl amine, Ethyl benzoate, and Phenol. We need to determine which of these compounds can give a positive result in Liebermann's test.

3. **Analyzing Each Option**:
- **Aniline**: Aniline is an amine and does not contain a hydroxyl (-OH) group directly attached to a benzene ring, so it does not give a positive result in Liebermann's test.
- **Ethyl Amine**: Ethyl amine is also an amine and lacks the phenolic -OH group, thus it will not respond to Liebermann's test.
- **Ethyl Benzoate**: Ethyl benzoate is an ester and does not contain a phenolic -OH group, so it cannot yield a positive result in this test.
- **Phenol**: Phenol contains a hydroxyl (-OH) group attached to a benzene ring, making it the only compound among the options that can undergo the Liebermann's test.

4. **Performing the Test**: In the Liebermann's test, phenol reacts with sodium nitrite (NaNO2) and hydrochloric acid (HCl) in the presence of nitrous acid (HNO2) to form para-nitrosophenol, which is a colored compound indicating a positive result.

5. **Conclusion**: Since only phenol can give a positive result in Liebermann's test, the correct answer is **Phenol**.

**Final Answer**: Liebermann's test is answered by **Phenol**.

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