Nitrosobenzene can be prepared by oxidizing aniline from

Options

A. `H_(2)SO_(4)`
B. `H_(2)SO_(5)`
C. `H_(2)SO_(3)`
D. `K_(2)Cr_(2)O_(7)`

Answer

To prepare nitrosobenzene from aniline, we can follow these steps:

### Step 1: Identify Aniline
Aniline is an aromatic amine with the chemical formula C6H5NH2. It consists of a phenyl group (C6H5) attached to an amino group (NH2).

### Step 2: Choose the Oxidizing Agent
In this case, we will use peroxymonosulfuric acid (H2SO5), which is also known as Caro's acid. This oxidizing agent is effective in converting aniline to nitrosobenzene.

### Step 3: Reaction Mechanism
When aniline is treated with peroxymonosulfuric acid, the amino group (-NH2) of aniline is oxidized to a nitroso group (-NO). This transformation results in the formation of nitrosobenzene (C6H5NO).

### Step 4: Write the Chemical Equation
The chemical reaction can be represented as follows:

\[ \text{C}_6\text{H}_5\text{NH}_2 + \text{H}_2\text{SO}_5 \rightarrow \text{C}_6\text{H}_5\text{NO} + \text{by-products} \]

### Step 5: Conclusion
Thus, nitrosobenzene can be prepared by oxidizing aniline using peroxymonosulfuric acid.

### Final Answer
The correct option for the preparation of nitrosobenzene from aniline is option B (using H2SO5).

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