Assertion : When acetamide reacts with `NaOH and Br_(2)`, methyl amine is formed.
Reason : The reaction occurs through intermediate formation of isocyanate.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

### Step 1: Understanding the Assertion
The assertion states that when acetamide (CH₃CONH₂) reacts with NaOH and Br₂, methyl amine (CH₃NH₂) is formed.

- **Reaction Overview**: The reaction involves acetamide, sodium hydroxide (NaOH), and bromine (Br₂).

### Step 2: Writing the Reaction
The reaction can be represented as follows:

1. **Starting Materials**:
- Acetamide: CH₃CONH₂
- Sodium Hydroxide: NaOH
- Bromine: Br₂

2. **Reaction**:
\[ \text{CH}_3\text{CONH}_2 + \text{NaOH} + \text{Br}_2 \rightarrow \text{CH}_3\text{NH}_2 + \text{NaBr} + \text{Na}_2\text{CO}_3 + \text{H}_2\text{O} \]

### Step 3: Confirming the Formation of Methyl Amine
Upon reacting acetamide with NaOH and Br₂, methyl amine is indeed produced along with sodium bromide (NaBr) and sodium carbonate (Na₂CO₃). Thus, the assertion is correct.

### Step 4: Understanding the Reason
The reason states that the reaction occurs through the intermediate formation of isocyanate.

- **Mechanism Overview**: The mechanism involves the formation of an isocyanate intermediate before yielding methyl amine.

### Step 5: Mechanism of Reaction
1. **Formation of Bromoamide**:
- The hydroxide ion (OH⁻) attacks the carbonyl carbon of acetamide, leading to the formation of a bromoamide intermediate.

2. **Formation of Isocyanate**:
- The bromoamide undergoes rearrangement to form isocyanate (R-N=C=O).

3. **Hydrolysis**:
- The isocyanate can then react with water to form carbamic acid, which subsequently decomposes to yield methyl amine and carbon dioxide.

### Step 6: Conclusion
Both the assertion and reason are correct:
- The assertion is true as acetamide does produce methyl amine when reacted with NaOH and Br₂.
- The reason is also true as the reaction proceeds through the formation of isocyanate.

### Final Answer
Both the assertion and reason are correct, and the reason is a correct explanation of the assertion.

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