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Diethyl ether is prepared by passing vap...

Diethyl ether is prepared by passing vapours of ethyl bromide over heated catalyst under high temperature and pressure. The catalyst is :

A

`SiO_(2)`

B

CuO

C

`Al_(2)O_(3)`

D

`Ag_(2)O`

Text Solution

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The correct Answer is:
To solve the question about the preparation of diethyl ether using ethyl bromide and a catalyst, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Reaction**: Diethyl ether can be synthesized by the reaction of ethyl bromide (C2H5Br) with a catalyst under high temperature and pressure. 2. **Identify the Catalyst**: The catalyst used in this reaction is dry silver oxide (Ag2O). This catalyst helps facilitate the reaction between the alkyl halide and the ether formation. 3. **Write the Reaction**: - The reaction involves passing vapors of ethyl bromide over heated dry silver oxide. - The reaction can be represented as: \[ 2 \, C_2H_5Br + Ag_2O \rightarrow C_2H_5OC_2H_5 + 2 \, AgBr \] - Here, diethyl ether (C2H5OC2H5) is formed along with silver bromide (AgBr) as a byproduct. 4. **Mechanism of the Reaction**: - Ethyl bromide has a partial positive charge on the ethyl group and a partial negative charge on the bromine atom. - The lone pairs of electrons on the oxygen in silver oxide interact with the ethyl group, leading to the opening of the C-Br bond. - This results in the formation of a C-O bond and the release of AgBr. 5. **Final Product**: The final product of this reaction is diethyl ether (C2H5OC2H5), which is also known as ethoxy ethylene. 6. **Conclusion**: Therefore, the catalyst used in the preparation of diethyl ether from ethyl bromide is dry silver oxide (Ag2O). ### Final Answer: The catalyst used is **dry silver oxide (Ag2O)**. ---
To solve the question about the preparation of diethyl ether using ethyl bromide and a catalyst, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Reaction**: Diethyl ether can be synthesized by the reaction of ethyl bromide (C2H5Br) with a catalyst under high temperature and pressure. 2. **Identify the Catalyst**: The catalyst used in this reaction is dry silver oxide (Ag2O). This catalyst helps facilitate the reaction between the alkyl halide and the ether formation. ...
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