Which of the following statements is incorrect?

Options

A. Different resonating structures contribute to the resonance hybrid in proportion of their energies.
B. Equivalent resonating structures result in higher resonance energy.
C. Resonating structures represent hypothetical molecules having no real existance.
D. Resonating structure are less stable than the resonance hybrid.

Answer

To determine which of the statements regarding resonance is incorrect, we will analyze each statement based on our understanding of resonance structures and their contributions to the resonance hybrid.

### Step-by-Step Solution:

1. **Understanding Resonance**:
- Resonance occurs when multiple Lewis structures (resonating structures) can be drawn for a molecule. These structures represent different possible arrangements of electrons.

2. **Analyzing Each Statement**:
- **Statement 1**: Different resonating structures contribute to the resonance hybrid in proportion to their energies.
- This statement is incorrect. The contribution of each resonating structure to the resonance hybrid is inversely proportional to its energy. Lower energy structures contribute more to the resonance hybrid.

- **Statement 2**: Equivalent resonating structures result in high resonance energy.
- This statement is correct. Equivalent structures lead to greater stability and thus higher resonance energy.

- **Statement 3**: Resonating structures represent hypothetical molecules having no real existence.
- This statement is correct. Resonating structures are theoretical constructs and do not exist as real entities.

- **Statement 4**: Resonating structures are less stable than the resonance hybrid.
- This statement is correct. The resonance hybrid is the most stable form, as it represents the average of all contributing structures.

3. **Conclusion**:
- After analyzing all the statements, we find that **Statement 1** is the incorrect one. The correct understanding is that the contribution of resonating structures to the resonance hybrid is inversely proportional to their energy.

### Final Answer:
The incorrect statement is: **Different resonating structures contribute to the resonance hybrid in proportion to their energies.**

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