Which one of the following on oxidation gives a ketone ?

Options

A. Primary alcohol
B. Secondary alcohol
C. Tertiary alcohol
D. All of these

Answer

To solve the question "Which one of the following on oxidation gives a ketone?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Alcohol Types**:
- There are three types of alcohols: primary, secondary, and tertiary.
- **Primary alcohols** (R-CH2OH) oxidize to form **aldehydes** (R-CHO), which can further oxidize to form **carboxylic acids** (R-COOH).
- **Secondary alcohols** (R1-CHOH-R2) oxidize to form **ketones** (R1-CO-R2).
- **Tertiary alcohols** (R1-R2C(OH)-R3) do not oxidize easily because oxidation leads to the cleavage of carbon-carbon bonds.

2. **Identifying the Correct Alcohol**:
- The question requires us to identify which type of alcohol, when oxidized, will yield a ketone.
- Since secondary alcohols are the only type that directly oxidizes to form ketones, we need to look for a secondary alcohol in the options provided.

3. **Conclusion**:
- Therefore, the correct answer to the question is that a **secondary alcohol** on oxidation gives a ketone.

### Final Answer:
The correct option is **secondary alcohol**.

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