Point out the incorrect statement about resonance.

Options

A. Resonance structures should have equal
B. In resonance structures , the constituent atoms should be in the same position
C. In resonance structures , there should not be in the same number of electron pairs
D. Resonance structures should differ only in the location of electrons around the constituent atoms

Answer

To determine the incorrect statement about resonance, let's analyze each statement one by one:

1. **Statement 1**: "Resonance structures should have equal energy."
- Resonance structures are representations of the same molecule that differ only in the arrangement of electrons. For a set of resonance structures to be valid, they should ideally have similar energy levels. Therefore, this statement is **true**.

2. **Statement 2**: "In resonance structures, the constituent atoms should be in the same position."
- In resonance structures, the positions of the atoms remain unchanged; only the electrons are redistributed. Thus, this statement is also **true**.

3. **Statement 3**: "The resonance structures should not have the same number of electron pairs."
- This statement is misleading. In valid resonance structures, the number of electron pairs around each atom must remain the same. Therefore, this statement is **false**.

4. **Statement 4**: "Resonance structures should differ only in the location of electrons around the constituent atoms."
- This statement is accurate as resonance structures differ only in the arrangement of electrons, not in the arrangement of atoms. Hence, this statement is **true**.

Based on the analysis, the incorrect statement about resonance is **Statement 3**.

### Step-by-Step Solution:
1. Identify the statements regarding resonance.
2. Analyze each statement for its validity.
3. Confirm that resonance structures should have equal energy (True).
4. Confirm that the positions of atoms remain the same in resonance structures (True).
5. Identify that resonance structures must have the same number of electron pairs (False).
6. Confirm that resonance structures differ only in the location of electrons (True).
7. Conclude that the incorrect statement is Statement 3.