Which of the following oxidation reactions can be carried out with chromic acid in aqueous acetone at `5-10^(@)C`

Options

A. `CH_(3)(CH_(2))_(3)C -= C-underset(OH)underset(|)(CH)-CH_(3)rarr CH_(3)(CH_(2))_(3)C-=Coverset(O)overset(||)(-)C-CH_(3)`
B. `CH_(3)(CH_(2))_(3)CH=CH-CH_(2)OHrarr CH_(3)(CH_(2))_(3)CH=CH-CHO`
C. `C_(6)H_(5)CH_(3)rarr C_(6)H_(5)COOH`
D. `CH_(3)(CH_(2))_(3)CH_(2)OH rarr CH_(3)(CH_(2))_(3)CHO`

Answer

To determine which oxidation reactions can be carried out with chromic acid in aqueous acetone at 5-10°C, we need to analyze each option based on the type of alcohol present (primary, secondary, or tertiary) and the expected products of their oxidation.

### Step-by-Step Solution:

1. **Identify the Type of Alcohol in Each Option:**
- **Option 1:** CH3CH2C≡C(CH3)OH (This is a secondary alcohol)
- **Option 2:** CH3CH2CHOH (This is a primary alcohol)
- **Option 3:** C6H5CH3 (This is a side-chain alcohol, which can be oxidized)
- **Option 4:** CH3CH2C(CH3)2OH (This is a tertiary alcohol)

2. **Determine the Oxidation Products:**
- **Option 1:** Secondary alcohol oxidizes to a ketone. Thus, it can be oxidized.
- **Option 2:** Primary alcohol oxidizes to an aldehyde. Thus, it can be oxidized.
- **Option 3:** Side-chain oxidation of a methyl group attached to a benzene ring will yield benzoic acid. Thus, it can be oxidized.
- **Option 4:** Tertiary alcohol does not oxidize under these conditions. Thus, it cannot be oxidized.

3. **Conclusion:**
- The oxidation reactions that can be carried out with chromic acid in aqueous acetone at 5-10°C are from Options 1, 2, and 3. Option 4 cannot be oxidized.

### Final Answer:
The oxidation reactions that can be carried out are from Options 1, 2, and 3.