Question

But-1-yne on reaction with dilute H2​SO4​ in the presence of Hg2+ ions at 333K gives:

• A.

  

• B.

  

• C.

  

• D.

  

Hint:

But-1-yne reacts with HSO and Hg2+ to form butan-2-one via hydration and tautomerism.

Answer 1

The Correct Option is A

But-1-yne reacts with dilute sulfuric acid (H2​SO4​) in the presence of mercuric ions (Hg2+) to form butan-2-one (methyl ethyl ketone). The reaction proceeds via the addition of water across the triple bond, followed by keto-enol tautomerism.