An unsaturated hydrocarbon [ A ] undergoes the following series of reactions. Identify [ A ] .

Step-by-step solution

The hydrocarbon [A] reacts with ammoniacal AgNO₃ to give no reaction, which indicates that it is not a terminal alkyne. This eliminates but-1-yne and propyne. The reaction of [A] with Na/liquid NH₃ gives a trans product, which is a characteristic reaction of internal alkynes to form trans-alkenes. This suggests [A] is an internal alkyne. The reaction of [A] with alkaline KMnO₄ at 383 K yields 2 moles of a carboxylic acid with formula C₂H₄O₂ , which is acetic acid ( CH₃COOH ). This implies that the oxidative cleavag