Which of the following amides will give ethylamine reaction with sodium hypobromide?

Options

A. Butanamide
B. Propanamide
C. Acetamide
D. Benzamide

Answer

To determine which amide will give ethylamine when reacted with sodium hypobromite (NaOBr), we need to understand the mechanism of the reaction. Sodium hypobromite is known to react with primary amides to produce primary amines through a process known as the Hofmann degradation reaction.

### Step-by-Step Solution:

1. **Identify the Structure of Ethylamine**:
Ethylamine is a primary amine with the structure CH3CH2NH2.

2. **Understand the Reaction of Amides with Sodium Hypobromite**:
When a primary amide reacts with sodium hypobromite, it undergoes a reaction where the carbonyl carbon of the amide is converted to a bromoamide, which then leads to the formation of a primary amine.

3. **General Reaction**:
The general reaction can be represented as:
\[ RCONH2 + NaOBr \rightarrow RNH2 + NaBr + CO2 + H2O \]
Here, R is the alkyl group attached to the amide.

4. **Determine the Required Amide**:
To produce ethylamine (CH3CH2NH2), we need to find an amide where the R group is ethyl (C2H5). Therefore, the amide should be ethylamide (C2H5CONH2).

5. **Conclusion**:
The amide that will give ethylamine upon reaction with sodium hypobromite is ethylamide (C2H5CONH2).

### Final Answer:
The amide that will give ethylamine when reacted with sodium hypobromite is **ethylamide (C2H5CONH2)**.