Question

acetylene on hydration gives - ?​

Answer 1

Berthelot can be obtained when hydration is done with acetylene.

Answer 2

As with alkenes,hydration (addition of water) to alkynes requires a strong acid, usually sulfuric acid, and is facilitated by mercuric sulfate. However, unlike the additions to double bonds which give alcohol products, addition of water to alkynes gives ketone products ( except for acetylene which yields acetaldehyde ).