The reaction of acetaldehyde with conc. `KMnO_4` gives

Options

A. `CH_3COOH`
B. `CH_3CH_2OH`
C. HCHO
D. `CH_3OH`

Explanation

To solve the question regarding the reaction of acetaldehyde with concentrated KMnO4, we can follow these steps:

### Step 1: Identify the Reactants
Acetaldehyde is the reactant in this reaction. Its chemical formula is CH3CHO.

### Step 2: Understand the Nature of KMnO4
KMnO4 (potassium permanganate) is a strong oxidizing agent, especially in concentrated form. It is commonly used to oxidize aldehydes to carboxylic acids.

### Step 3: Predict the Reaction
When acetaldehyde (CH3CHO) is treated with concentrated KMnO4, it undergoes oxidation. Aldehydes are typically oxidized to carboxylic acids.

### Step 4: Write the Product
The oxidation of acetaldehyde (CH3CHO) will yield ethanoic acid (acetic acid), which has the chemical formula CH3COOH.

### Step 5: Conclusion
Therefore, the reaction of acetaldehyde with concentrated KMnO4 produces ethanoic acid (CH3COOH).

### Final Answer
The reaction of acetaldehyde with concentrated KMnO4 gives ethanoic acid (CH3COOH).

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