Question

state one reaction to confirm
the acidic nature of ethyne?

Answer 1

C2H4 + H20 - CH3CH2OH

Answer 2

Acetylene shows acidic character because carbon is sp hybridized containing 50% s-character which makes –C-H bond highly acidic in nature. The acidic character of –C-H can be easily justified when heated with sodium metal which displaces hydrogen from acetylene forming sodium acetylide.

HC≡CH + Na → HC≡CNa + ½H2
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