Electromeric effect is a .......... effect and involves transfer of .......... electrons of a multiple bond.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Electromeric Effect:**
- The electromeric effect is a phenomenon observed in organic compounds that have multiple bonds (like double or triple bonds). It is characterized by the movement of electrons in response to an attacking reagent.

2. **Identifying the Nature of the Effect:**
- The electromeric effect is classified as a **temporary effect**. This means that it occurs only in the presence of an attacking species (like an electrophile) and is not a permanent change in the molecule.

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