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 reaction step by step.

### Step 1: Write the balanced chemical equation for the reaction.
The reaction between hydrogen peroxide and hydrogen sulfide can be represented as follows:

\[ H_2S + H_2O_2 \rightarrow H_2O + S \]

### Step 2: Identify the changes in oxidation states.
- In H₂S, sulfur (S) has an oxidation state of -2.
- In H₂O₂, oxygen (O) has an oxidation state of -1.
- In the products, water (H₂O) has oxygen at -2 and sulfur (S) is in its elemental form with an oxidation state of 0.

### Step 3: Determine if oxidation or reduction occurs.
- The oxidation state of sulfur changes from -2 in H₂S to 0 in elemental sulfur (S), indicating that sulfur is oxidized.
- The oxidation state of oxygen in H₂O₂ decreases from -1 to -2 in H₂O, indicating that oxygen is reduced.

### Step 4: Classify the reaction.
Since there is both oxidation (of sulfur) and reduction (of oxygen) occurring in this reaction, it is classified as a redox (reduction-oxidation) reaction.

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

### Final Answer:
The correct answer is **redox reaction**.

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