Which of the following does not exhibit electromeric effect?

Options

A. Ethers
B. Aldehydes
C. Ketones
D. Alkenes

Explanation

To determine which of the following compounds does not exhibit the electromeric effect, we first need to understand what the electromeric effect is.

### Step-by-Step Solution:

1. **Understanding the Electromeric Effect**:
- The electromeric effect occurs when an attacking reagent (like an electrophile or nucleophile) interacts with a molecule that has multiple bonds (double or triple bonds).
- In this interaction, the bond pair of electrons in the multiple bond shifts towards one of the atoms involved in the bond, leading to a temporary polarization of the molecule.

2. **Identifying the Compounds**:
- The question provides four types of compounds: Ether, Aldehydes, Ketones, and Alkenes.
- We need to analyze each compound to see if they contain multiple bonds.

3. **Analyzing Each Compound**:
- **Ether**: The general structure of an ether is R-O-R', where R and R' are alkyl groups. Ethers do not contain double or triple bonds.
- **Aldehydes**: The structure of an aldehyde is R-CHO, which contains a carbonyl group (C=O), indicating a double bond.
- **Ketones**: The structure of a ketone is R-CO-R', which also contains a carbonyl group (C=O), indicating a double bond.
- **Alkenes**: The structure of an alkene is R-CH=CH-R', which contains a double bond between carbon atoms.

4. **Conclusion**:
- Among the given options, only **Ether** does not have multiple bonds. Therefore, it does not exhibit the electromeric effect.

### Final Answer:
**Ether does not exhibit the electromeric effect.**