What is not applicable to ozone ?

Options

A. It is a bent molecule with bond angle approximately `117^@`
B. It has four lone pairs of electrons in one of its Lewis formula
C. The two O-O bond lengths are equal
D. It is an allotrope of oxygen.

Answer

To solve the question "What is not applicable to ozone?", we will analyze the statements provided and determine which one is incorrect.

### Step-by-Step Solution:

1. **Identify the Molecular Formula of Ozone**:
- The molecular formula of ozone is O₃, which indicates it consists of three oxygen atoms.

2. **Analyze the First Statement**:
- The first statement claims that ozone is a bent molecule with a bond angle of approximately 117 degrees.
- The actual bond angle in ozone is approximately 116 degrees, which is close to the stated value. Therefore, this statement is **true**.

3. **Analyze the Second Statement**:
- The second statement claims that ozone has four lone pairs of electrons in one of its Lewis structures.
- Upon drawing the Lewis structure of ozone, we find that there are a total of 6 lone pairs of electrons (2 on one oxygen, 2 on another, and 1 on the central oxygen). Thus, this statement is **incorrect**.

4. **Analyze the Third Statement**:
- The third statement claims that the two O-O bond lengths in ozone are equal.
- Due to resonance in the ozone molecule, the bond lengths between the oxygen atoms are indeed equal. Therefore, this statement is **true**.

5. **Analyze the Fourth Statement**:
- The fourth statement claims that ozone is an allotrope of oxygen.
- An allotrope is a different form of the same element. Since ozone (O₃) is a different form of oxygen (O₂), this statement is also **true**.

6. **Conclusion**:
- The only statement that is not applicable to ozone is the second statement, which incorrectly states that ozone has four lone pairs of electrons.

### Final Answer:
The statement that is not applicable to ozone is: **It has four lone pairs of electrons in one of its Lewis structures.**

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