Question

Which of the following compounds is obtained when quaternary ammonium hydroxide is strongly heated ?

• A. Alkane
• B. Alkyne
• C. Alkene
• D. Amide

Hint:

Hofmann elimination of quaternary ammonium hydroxides gives alkenes as the main product.

Answer 1

The Correct Option is C

Step 1: Understanding the reaction.
When quaternary ammonium hydroxides are strongly heated, they undergo Hofmann elimination.

Step 2: Nature of Hofmann elimination.
In this reaction, the quaternary ammonium hydroxide decomposes to give an alkene, a tertiary amine, and water.

Step 3: Product formed.
The major organic product of this elimination reaction is an alkene, generally the least substituted one.

Step 4: Conclusion.
Therefore, the compound obtained on strong heating of quaternary ammonium hydroxide is an alkene.