Question

Which of the following compound is not formed during Kolbe's electrolysis of ethyl propionate?

• A. n-Butane
• B. Ethane
• C. Ethylene
• D. n-Propane

Hint:

Kolbe's electrolysis of esters typically results in the formation of alkanes, not alkenes.

Answer 1

The Correct Option is C

Step 1: Kolbe Electrolysis.
In Kolbe's electrolysis of an ester like ethyl propionate, two molecules of the ester undergo decarboxylation at the anode, leading to the formation of alkanes. The reaction does not form ethylene as ethylene is an unsaturated compound, and Kolbe's electrolysis typically forms saturated alkanes.

Step 2: Formation of Alkanes.
During the electrolysis, products such as n-butane, n-propane, and ethane can form due to the decarboxylation of the ester, but ethylene does not appear.

Step 3: Conclusion.
Hence, ethylene is not formed during Kolbe's electrolysis of ethyl propionate. The correct answer is (3) Ethylene.

Final Answer: \[ \boxed{\text{(3) Ethylene}} \]