Question

Assertion (A): Reaction of H₂O to acetylene in presence of H₂SO₄ and HgSO₄ gives acetaldehyde.

Reason (R): It is an example of addition reaction.

Options

• If both A and R are true, and R is the correct explanation of A.

• If both A and R are true, but R is not the correct explanation of A.

• If A is true, but R is false.

• If both A and R are false.

Answer 1

If both A and R are true, and R is the correct explanation of A.

Explanation:

Acetylene (C₂H₂) adds water in the presence of H₂SO₄ and HgSO₄. First, an unstable compound is formed, which then changes into acetaldehyde.

\[\ce{HC ≡ CH + H2O ->[H2SO4][HgSO4] CH3CHO}\]

So, it is an addition reaction because water is added to acetylene.