Which of the following gives ketone on oxidation?

Options

A. `(CH_(3))_(3)COH`
B. `CH_(3)CH_(2)CH_(2)OH`
C. `(CH_(3))_(2)CHCH_(2)OH`
D. `CH_(3)CHOHCH_(3)`

Answer

To determine which of the given alcohols produces a ketone upon oxidation, we need to analyze the types of alcohols provided and their oxidation products.

### Step-by-Step Solution:

1. **Identify the Types of Alcohols**:
- **Primary Alcohols**: These have the hydroxyl (-OH) group attached to a carbon that is connected to only one other carbon atom. Upon oxidation, primary alcohols are converted to aldehydes.
- **Secondary Alcohols**: These have the -OH group attached to a carbon that is connected to two other carbon atoms. Upon oxidation, secondary alcohols are converted to ketones.
- **Tertiary Alcohols**: These have the -OH group attached to a carbon that is connected to three other carbon atoms. Tertiary alcohols typically do not oxidize to form aldehydes or ketones; instead, they may undergo dehydration to form alkenes.

2. **Analyze Each Given Alcohol**:
- **Alcohol 1**: CH3(CH3)3C(OH) - This is a tertiary alcohol. Upon oxidation, it will not form a ketone; it may dehydrate to form an alkene.
- **Alcohol 2**: CH3CH2CH2OH - This is a primary alcohol. Upon oxidation, it will form an aldehyde, not a ketone.
- **Alcohol 3**: CH3(CH3)C(OH)CH3 - This is a secondary alcohol. Upon oxidation, it will produce a ketone.
- **Alcohol 4**: CH3OH - This is a primary alcohol. Upon oxidation, it will also form an aldehyde.

3. **Conclusion**:
- The only alcohol that gives a ketone upon oxidation is **Alcohol 3**: CH3(CH3)C(OH)CH3.

### Final Answer:
The alcohol that gives a ketone on oxidation is **CH3-CH(OH)-CH3** (the secondary alcohol).

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