Nitrobenzene can be converted into hydraxobenzene by reduction with

Options

A. `Zn //NaOH`
B. `Zn//" sodium amalgam"`
C. `Al//Hg`
D. `Sn //HCI`

Answer

To convert nitrobenzene into hydrazobenzene through reduction, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The starting compound is nitrobenzene (C6H5NO2), which contains a nitro group (-NO2) attached to a benzene ring.

2. **Understand the Target Product**:
- The target compound is hydrazobenzene (C6H4(N2H2)), which has two nitrogen atoms connected by a single bond (hydrazine structure) attached to the benzene ring.

3. **Select the Reducing Agent**:
- To reduce nitrobenzene to hydrazobenzene, we need a suitable reducing agent. The options provided include various reagents.

4. **Evaluate the Options**:
- **Option A: Zinc in the presence of Sodium Hydroxide (NaOH)**: This combination is known to effectively reduce nitro compounds to hydrazines. Therefore, this is a suitable choice.
- **Option B: Zinc Sodium Amalgam**: This reagent is typically used in Clemenson reduction and would not yield hydrazobenzene.
- **Option C: Sn/HCl**: This combination would reduce nitrobenzene to aniline (C6H5NH2), not hydrazobenzene.
- **Option D: Aluminum and Mercury**: Similar to Sn/HCl, this would also reduce nitrobenzene to aniline, not hydrazobenzene.

5. **Conclusion**:
- The correct reducing agent for converting nitrobenzene to hydrazobenzene is **Zinc in the presence of Sodium Hydroxide (NaOH)**.

### Final Answer:
The correct answer is **A: Zinc in the presence of Sodium Hydroxide (NaOH)**.

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