Which statements are correct in the case of acetaldehyde and acetone ?

Options

A. Both react with hydroxylamine
B. Both react with `NaHSO_(3)`
C. Both react with hydrazine
D. Both reduce ammoniacal silver nitrate

Answer

To determine which statements about acetaldehyde and acetone are correct, let's analyze each statement step by step.

### Step 1: Reaction with Hydroxylamine
Both acetaldehyde (CH3CHO) and acetone (CH3COCH3) react with hydroxylamine (NH2OH) to form oximes.

- **Acetaldehyde Reaction**:
\[ \text{CH}_3\text{CHO} + \text{NH}_2\text{OH} \rightarrow \text{CH}_3\text{C}(=N\text{OH})\text{H} + \text{H}_2\text{O} \]
- **Acetone Reaction**:
\[ \text{CH}_3\text{COCH}_3 + \text{NH}_2\text{OH} \rightarrow \text{CH}_3\text{C}(=N\text{OH})\text{CH}_3 + \text{H}_2\text{O} \]

**Conclusion**: This statement is correct.

### Step 2: Reaction with Sodium Bisulfite (NaHSO3)
Both acetaldehyde and acetone react with sodium bisulfite to form bisulfite adducts.

- **Acetaldehyde Reaction**:
\[ \text{CH}_3\text{CHO} + \text{NaHSO}_3 \rightarrow \text{CH}_3\text{C}(O\text{Na})(\text{HSO}_3) + \text{H}_2\text{O} \]
- **Acetone Reaction**:
\[ \text{CH}_3\text{COCH}_3 + \text{NaHSO}_3 \rightarrow \text{CH}_3\text{C}(O\text{Na})(\text{HSO}_3)\text{CH}_3 + \text{H}_2\text{O} \]

**Conclusion**: This statement is also correct.

### Step 3: Reaction with Hydrazine
Both acetaldehyde and acetone react with hydrazine (NH2NH2) to form hydrazones.

- **General Reaction**:
\[ \text{RCHO} + \text{NH}_2\text{NH}_2 \rightarrow \text{RCH}=N\text{NH}_2 + \text{H}_2\text{O} \]

**Conclusion**: This statement is correct as well.

### Step 4: Reaction with Ammonical Silver Nitrate (Tollens' Reagent)
Ammonical silver nitrate is used to detect aldehydes.

- **Acetaldehyde Reaction**:
\[ \text{CH}_3\text{CHO} + \text{Ag(NH}_3)_2^+ \rightarrow \text{CH}_3\text{COOH} + \text{Ag}^0 \text{ (silver mirror)} \]
- **Acetone Reaction**: Acetone does not react with Tollens' reagent, thus it does not produce a silver mirror.

**Conclusion**: This statement is incorrect.

### Final Conclusion
The correct statements regarding acetaldehyde and acetone are:
1. Both react with hydroxylamine.
2. Both react with sodium bisulfite.
3. Both react with hydrazine.

The statement regarding the reaction with ammonical silver nitrate is incorrect, as only acetaldehyde reacts with it.