Phenol on hydrogenation in the presence of nickel catalyst at `160^(@)C` gives

Options

A. benzene
B. cyclohexane
C. cyclohexanol
D. hexan `-`l`-`ol

Explanation

To solve the question about the product formed when phenol undergoes hydrogenation in the presence of a nickel catalyst at 160°C, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactant**: The reactant given is phenol, which has the chemical formula C6H5OH. It consists of a benzene ring (C6H5) attached to a hydroxyl group (OH).

2. **Understand Hydrogenation**: Hydrogenation is a chemical reaction that involves the addition of hydrogen (H2) to a compound, typically in the presence of a catalyst. In this case, the catalyst is nickel (Ni).

3. **Reaction Conditions**: The reaction is carried out at a temperature of 160°C. This temperature is sufficient to facilitate the hydrogenation process.

4. **Analyze the Structure of Phenol**: Phenol has a hydroxyl group attached to a benzene ring. During hydrogenation, the double bonds in the benzene ring can be reduced.

5. **Predict the Product**: When phenol is hydrogenated, the double bonds in the benzene ring are converted to single bonds, resulting in the formation of cyclohexanol (C6H12O). This is because the benzene ring transforms into a cyclohexane structure with a hydroxyl group.

6. **Select the Correct Answer**: Among the options provided, we need to identify the correct product. The correct product of the hydrogenation of phenol is cyclohexanol.

### Final Answer:
Phenol on hydrogenation in the presence of nickel catalyst at 160°C gives **cyclohexanol**.