Diethyl ether and methyl `n` propyl ether are

Options

A. Chain
B. Functional
C. Metamerism
D. Posotion

Answer

To determine the relationship between diethyl ether and methyl n-propyl ether, we need to analyze their structures and the type of isomerism they exhibit.

### Step 1: Identify the structures of the compounds
- **Diethyl ether**: The structure can be represented as CH3-CH2-O-CH2-CH3. This means it has two ethyl groups (C2H5) connected by an oxygen atom.
- **Methyl n-propyl ether**: The structure can be represented as CH3-O-CH2-CH2-CH3. This means it has a methyl group (CH3) and a n-propyl group (C3H7) connected by an oxygen atom.

### Step 2: Compare the molecular formulas
- **Diethyl ether**: C4H10O (from 2 ethyl groups)
- **Methyl n-propyl ether**: C4H10O (from 1 methyl and 1 n-propyl group)

Both compounds have the same molecular formula (C4H10O), which indicates that they are isomers.

### Step 3: Determine the type of isomerism
- **Chain isomerism**: This occurs when compounds have the same molecular formula but different carbon chain arrangements. This is not applicable here because both compounds have different alkyl groups.
- **Functional isomerism**: This occurs when compounds have the same molecular formula but different functional groups. This is also not applicable as both compounds are ethers.
- **Positional isomerism**: This occurs when compounds have the same molecular formula and the same functional group but differ in the position of that functional group. This is not applicable here as the functional groups are not in different positions.
- **Metamerism**: This occurs when compounds have the same molecular formula but differ in the nature of the alkyl groups attached to the functional group (in this case, the ether oxygen). This is applicable here because diethyl ether has two ethyl groups, while methyl n-propyl ether has a methyl and a propyl group.

### Conclusion
Based on the analysis, diethyl ether and methyl n-propyl ether exhibit **metamerism**.

### Final Answer
The answer is **C) Metamerism**.

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