Nitrobenzene combines with hydrogen in the presence of platinum to produce.

Options

A. Toluene
B. Benzene
C. Aniline
D. Azobenzene

Explanation

To solve the question "Nitrobenzene combines with hydrogen in the presence of platinum to produce what?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are nitrobenzene (C6H5NO2) and hydrogen gas (H2).

2. **Understand the Role of Platinum**:
- Platinum (Pt) acts as a catalyst in this reaction. It facilitates the reaction without being consumed in the process.

3. **Recognize the Type of Reaction**:
- This is a reduction reaction. Nitrobenzene contains a nitro group (NO2), which is reduced to an amine group (NH2) when hydrogen is added.

4. **Write the Reaction**:
- The balanced chemical equation for the reaction can be written as:
\[ C_6H_5NO_2 + 3H_2 \xrightarrow{Pt} C_6H_5NH_2 + 2H_2O \]
- Here, nitrobenzene is converted to aniline (C6H5NH2) and water (H2O).

5. **Identify the Product**:
- The main product of this reaction is aniline (C6H5NH2), which is an aromatic amine.

### Final Answer:
Nitrobenzene combines with hydrogen in the presence of platinum to produce **aniline**.

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