The reaction of `H_2O_2` with `H_2S` is an example of ………reaction .

Options

A. addition
B. oxidation
C. reduction
D. redox

Answer

To determine the type of reaction that occurs when hydrogen peroxide (H₂O₂) reacts with hydrogen sulfide (H₂S), we can analyze the changes in oxidation states of the elements involved.

### Step-by-Step Solution:

1. **Identify the Reactants:**
The reactants in the reaction are hydrogen peroxide (H₂O₂) and hydrogen sulfide (H₂S).

2. **Determine the Oxidation States:**
- For H₂O₂:
- The oxidation state of oxygen in H₂O₂ is -1 (since each hydrogen is +1, the total must equal 0).
- For H₂S:
- The oxidation state of sulfur in H₂S is -2 (each hydrogen is +1, and the total must equal 0).

3. **Analyze the Reaction:**
When H₂O₂ reacts with H₂S, the sulfur atom is oxidized, and the oxygen in H₂O₂ is reduced. This can be represented as:
- H₂O₂ + H₂S → H₂O + S (sulfur is released).

4. **Identify Changes in Oxidation States:**
- In the reaction, the oxidation state of oxygen in H₂O₂ changes from -1 to -2, indicating a reduction (gain of electrons).
- The oxidation state of sulfur in H₂S changes from -2 to 0, indicating oxidation (loss of electrons).

5. **Conclusion:**
Since there is both oxidation (increase in oxidation state of sulfur) and reduction (decrease in oxidation state of oxygen) occurring simultaneously in the reaction, this type of reaction is classified as a **redox reaction**.

### Final Answer:
The reaction of H₂O₂ with H₂S is an example of a **redox reaction**.