Oxidation number of oxygen in ozone

Options

A. 0
B. `-2`
C. `+2`
D. `-6`

Explanation

To determine the oxidation number of oxygen in ozone (O₃), we can follow these steps:

### Step-by-Step Solution:

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

2. **Understand the Structure of Ozone**:
Ozone has a bent structure, and it can be represented as having one oxygen atom with a formal oxidation state of +1 and another with -1, while the third oxygen atom has an oxidation state of 0. This can be visualized as follows:
- One O atom is in a +1 oxidation state.
- One O atom is in a -1 oxidation state.
- The third O atom is in a 0 oxidation state.

3. **Calculate the Average Oxidation State**:
To find the average oxidation state of the three oxygen atoms in ozone, we can sum the oxidation states and divide by the number of atoms:
\[ \text{Average oxidation state} = \frac{(+1) + (-1) + (0)}{3} = \frac{0}{3} = 0 \]

4. **Conclusion**:
Therefore, the oxidation number of oxygen in ozone is 0.

### Final Answer:
The oxidation number of oxygen in ozone (O₃) is **0**.