Acetic acid when heated `(300^(@)C)` with MnO gives

Options

A. formaldehyde
B. acetaldehyde
C. acetone
D. butanone

Answer

To solve the question, "Acetic acid when heated at 300°C with MnO gives," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The reactant in this case is acetic acid (CH₃COOH), and it is heated with manganese(IV) oxide (MnO₂).

2. **Understand the Reaction Conditions**: The reaction takes place at a high temperature of 300°C. High temperatures can lead to decarboxylation or oxidation reactions.

3. **Predict the Reaction Products**: When acetic acid is heated with MnO₂, it undergoes oxidation. The oxidation of acetic acid can lead to the formation of ketones.

4. **Determine the Major Product**: In this case, the major product formed when acetic acid is oxidized is acetone (CH₃COCH₃). The reaction can be summarized as:
\[ 2 \text{CH}_3\text{COOH} \xrightarrow{\text{MnO}_2, 300^\circ C} \text{CH}_3\text{COCH}_3 + \text{H}_2\text{O} + \text{CO}_2 \]

5. **Select the Correct Option**: Among the given options (formaldehyde, acetalide, acetone, and butanone), the correct answer is acetone.

### Final Answer:
Acetic acid when heated at 300°C with MnO gives acetone.

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