In the Merck's process the reagents involved for the preparation of hydrogen peroxide are

Options

A. `BaO_(2),HCl`
B. `Na_(2)O_(2),H_(2)SO_(4)`
C. `BaO_(2),H_(2)CO_(3)`
D. `PbO_(2),H_(2)O`

Answer

To solve the question regarding the reagents involved in the Merck's process for the preparation of hydrogen peroxide, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the reagents used in the Merck's process for preparing hydrogen peroxide (H2O2).

2. **Identify the Process**: The Merck's process is a specific method for synthesizing hydrogen peroxide. It involves the reaction of sodium peroxide with dilute sulfuric acid.

3. **Write the Chemical Reaction**: The chemical reaction for the Merck's process can be represented as follows:
\[ \text{Na}_2\text{O}_2 + \text{H}_2\text{SO}_4 \rightarrow \text{H}_2\text{O}_2 + \text{Na}_2\text{SO}_4 \]
Here, sodium peroxide (Na2O2) reacts with dilute sulfuric acid (H2SO4) to produce hydrogen peroxide (H2O2) and sodium sulfate (Na2SO4) as a by-product.

4. **Identify the Reagents**: From the reaction, we can identify the reagents involved:
- Sodium peroxide (Na2O2)
- Dilute sulfuric acid (H2SO4)

5. **Select the Correct Option**: Based on the reagents identified, the correct option from the given choices is:
- **Na2O2 and H2SO4**

### Final Answer:
The reagents involved in the Merck's process for the preparation of hydrogen peroxide are **Na2O2 and H2SO4**.

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