Which of the following compounds is isomeric with
methyl vinyl ether?

Options

A. Propanal
B. 1-propanol
C. Ethyl methyl ether
D. Diethyl Ether

Explanation

To determine which compound is isomeric with methyl vinyl ether, we need to follow these steps:

### Step 1: Determine the Molecular Formula of Methyl Vinyl Ether
Methyl vinyl ether has the structure CH2=CHOCH3.

- Count the number of carbon (C), hydrogen (H), and oxygen (O) atoms:
- Carbon (C): 3
- Hydrogen (H): 6
- Oxygen (O): 1

Thus, the molecular formula for methyl vinyl ether is C3H6O.

### Step 2: Analyze the Given Compounds
We will analyze each compound to see if they have the same molecular formula (C3H6O).

1. **Propanol (CH3CH2CHO)**
- Count:
- C: 3
- H: 8
- O: 1
- Molecular formula: C3H8O (not isomeric)

2. **1-Propanol (CH3CH2CH2OH)**
- Count:
- C: 3
- H: 8
- O: 1
- Molecular formula: C3H8O (not isomeric)

3. **Ethyl Methyl Ether (CH3OCH2CH3)**
- Count:
- C: 4
- H: 10
- O: 1
- Molecular formula: C4H10O (not isomeric)

4. **Diethyl Ether (CH3CH2OCH2CH3)**
- Count:
- C: 4
- H: 10
- O: 1
- Molecular formula: C4H10O (not isomeric)

### Step 3: Identify the Isomer
Now, we need to find a compound that has the same molecular formula C3H6O.

After analyzing the above compounds, we find that none of them match the molecular formula of methyl vinyl ether. However, if we consider propanal (which is CH3CH2CHO), it has the same molecular formula C3H6O and is indeed an isomer of methyl vinyl ether.

### Conclusion
The compound that is isomeric with methyl vinyl ether is **propanal**.