Ethyl alcohol vapour is passed over alumina heated at about `250^(@)`. The major product formed in the reaction is

Options

A. `CH_(2) = CH_(2)`
B. `CH_(3) CH_(2) HSO_(4)`
C. `CH_(3)-CH_(2)-O-CH_(2)CH_(3)`
D. `CH_(3)-CH=CH_(2)`

Answer

To solve the question, we need to analyze the reaction of ethyl alcohol (ethanol) when it is passed over alumina (Al2O3) at a temperature of 250°C.

### Step-by-Step Solution:

1. **Identify the Reactant**: The reactant in this case is ethyl alcohol, which has the chemical formula CH3CH2OH.

2. **Understand the Reaction Conditions**: The ethyl alcohol vapor is passed over alumina (Al2O3) that is heated to about 250°C. Alumina acts as a catalyst in this reaction.

3. **Determine the Type of Reaction**: At 250°C, the reaction of alcohols over alumina typically leads to the formation of ethers rather than alkenes. This is a key point in understanding the outcome of the reaction.

4. **Predict the Major Product**: When ethyl alcohol is treated under these conditions, the major product formed is diethyl ether. The chemical structure of diethyl ether can be represented as CH3CH2OCH2CH3.

5. **Name the Product**: The product can also be referred to as ethoxyethane, which is another name for diethyl ether.

6. **Conclusion**: Therefore, the major product formed when ethyl alcohol vapor is passed over alumina at 250°C is diethyl ether (C2H5OC2H5).

### Final Answer:
The major product formed is diethyl ether (C2H5OC2H5).

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