Question

write two reactions to show acidic nature of acetylene .

Answer 1

i have given 2 reactions which represents the acidic property of alkyne (acetylene) as they can undergo substitution means losing Proton hence they show acidic property

Answer 2

Answer:

The reaction of acetylene with Na in liquid NH₃ and Tollen's reagent are two reactions to show the acidic nature of acetylene.

Explanation:

The sp hybridised carbon atom in ethyne has the highest s character and thus the highest electronegativity. As a result, it draws the shared pair of electrons in the C-H bond to a higher extent, making proton removal easier. As a result, the hydrogen connected to the triply linked carbon is acidic.

• Reaction with Na in liquid NH₃ :

        HC≡ CH + Na⁺NH₂⁻ → HC≡ C⁻Na⁺ + NH₃

• Reaction with Tollen's reagent :

       Tollen's reagent produces a white silver salt precipitate.

        HC≡ CH + 2AgNO₃ + 2NH₄OH → Ag-C≡ C-Ag + 2NH₄NO₃ + 2H₂O

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