`1^(@)` alcohol can be converted to aldehyde by using the reagent

Options

A. pyridinium chlorochromate
B. potassium dichromate
C. potassium permanganate
D. hydrogen peroxide

Answer

To convert a 1° alcohol to an aldehyde, we can use specific reagents that facilitate this transformation without further oxidation to carboxylic acids. Here’s a step-by-step solution to the question:

### Step 1: Identify the nature of the alcohol
1° alcohols (primary alcohols) have the general structure R-CH2OH, where R is an alkyl group.

### Step 2: Understand the oxidation process
Oxidation of alcohols involves the removal of hydrogen (H) atoms or the addition of oxygen (O) atoms. In the case of primary alcohols, they can be oxidized to aldehydes and then further to carboxylic acids if strong oxidizing agents are used.

### Step 3: Evaluate the reagents
We need to identify which reagent can selectively oxidize a 1° alcohol to an aldehyde without further oxidation to a carboxylic acid.

1. **Pyridinium Chlorochromate (PCC)**: This reagent is known for its ability to oxidize primary alcohols to aldehydes. It is a mild oxidizing agent and does not oxidize aldehydes to acids.

2. **Potassium Dichromate (K2Cr2O7)**: This is a strong oxidizing agent that can oxidize primary alcohols to carboxylic acids if not controlled.

3. **KMnO4 (Potassium Permanganate)**: In acidic conditions, this reagent will also oxidize primary alcohols to carboxylic acids.

4. **Hydrogen Peroxide (H2O2)**: This is also a strong oxidizing agent and can oxidize primary alcohols to carboxylic acids.

### Step 4: Conclusion
Among the given options, **Pyridinium Chlorochromate (PCC)** is the only reagent that can convert a 1° alcohol to an aldehyde without further oxidation to a carboxylic acid.

### Final Answer
The reagent that can convert 1° alcohol to aldehyde is **Pyridinium Chlorochromate (PCC)**.

---