A : `O_(3)` is better oxidizing agent than `H_(2) O_(2)` .
R : `O_3` converts Ag to `Ag_(2) O` .

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion , then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion , then mark (2)
C. If Assertion is true statement but Reason is false , then mark (3)
D. If both Assertion and Reason are false statements , then mark (4)

Answer

To solve the assertion-reason question regarding ozone (O3) and hydrogen peroxide (H2O2), we will analyze both the assertion and the reason step by step.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that O3 (ozone) is a better oxidizing agent than H2O2 (hydrogen peroxide).
- An oxidizing agent is a substance that can accept electrons and thereby oxidize another substance while being reduced itself.

2. **Analyzing Ozone (O3)**:
- Ozone is known to dissociate into diatomic oxygen (O2) and nascent oxygen (O).
- The nascent oxygen is a highly reactive form of oxygen that can readily oxidize other substances.
- Therefore, O3 acts as a strong oxidizing agent due to the presence of nascent oxygen.

3. **Understanding the Reason**:
- The reason states that O3 converts silver (Ag) to silver oxide (Ag2O).
- The reaction can be represented as:
\[ 3O_3 + 2Ag \rightarrow Ag_2O + 2O_2 \]
- In this reaction, silver (Ag) is oxidized from an oxidation state of 0 to +1 in Ag2O, indicating that O3 is indeed acting as an oxidizing agent.

4. **Comparing O3 and H2O2**:
- H2O2 can act as both an oxidizing agent and a reducing agent depending on the reaction conditions.
- For example, H2O2 can reduce Ag2O to Ag, indicating it can act as a reducing agent in certain reactions.
- This amphoteric nature of H2O2 makes it less effective as a strong oxidizing agent compared to O3.

5. **Conclusion**:
- Since O3 consistently acts as a strong oxidizing agent due to the presence of nascent oxygen and can oxidize metals like silver, while H2O2's oxidizing ability is conditional, we conclude that the assertion is true.
- The reason provided is also true, but it does not explain why O3 is a better oxidizing agent than H2O2.

### Final Answer:
- The assertion is true, and the reason is true, but the reason does not explain the assertion. Therefore, the correct choice is that both assertion and reason are true, but the reason is not the correct explanation of the assertion.