Which of the following statements about amine incorrect?

Options

A. Alkyl amines are stronger bases than ammonia
B. Alkyl amines are stronger bases than aryla amines
C. Alkyl amines react with nitrous acid to produce alcohols
D. Aryl amines react with nitrous acid to produce phenols

Explanation

To determine which statement about amines is incorrect, we will analyze each given option step by step.

### Step-by-Step Solution:

1. **Understanding Amines**:
- Amines are organic compounds derived from ammonia (NH3) by replacing one or more hydrogen atoms with alkyl or aryl groups. The general formula for amines can be represented as RNH2 (for primary amines), where R is an alkyl or aryl group.

2. **Analyzing the Statements**:
- **Statement 1**: "Alkyl amine is strongly basic compared to ammonia."
- **Explanation**: Alkyl groups are electron-donating, which increases the electron density on the nitrogen atom in alkyl amines, making them more basic than ammonia. This statement is **correct**.

- **Statement 2**: "Alkyl amine is strongly basic compared to aryl amine."
- **Explanation**: In aryl amines, the lone pair of electrons on the nitrogen is delocalized into the aromatic ring, reducing its availability for donation. Therefore, alkyl amines are indeed more basic than aryl amines. This statement is **correct**.

- **Statement 3**: "Alkyl amine reacts with nitrous acid to produce alcohol."
- **Explanation**: When alkyl amines react with nitrous acid (HNO2), they form alkyl diazonium salts, which can then hydrolyze to produce alcohol. This statement is **correct**.

- **Statement 4**: "Alkyl amine reacts with nitrous acid to produce phenol."
- **Explanation**: This statement is misleading. While aryl amines can react with nitrous acid to form diazonium salts, which can then produce phenol upon further reaction with NaOH, alkyl amines do not directly produce phenol from nitrous acid. Therefore, this statement is **incorrect**.

### Conclusion:
The incorrect statement about amines is **Statement 4**: "Alkyl amine reacts with nitrous acid to produce phenol."

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