Question

​What happens when a molecule of hydrogen is added to ethyne ? Explain

Answer 1

Generally alkynes undergo addition reactions.
Ethyne on reacting with hydrogen which is Hydrogenation first forms Ethene and finally Ethane.
So, the end product of Hydrogenation reaction of alkynes is alkanes.
 
H-C≡C-H(Ethyne) + H₂ → H₂C=CH₂(Ethene) + H₂ → H₃C-C H₃ (Ethane)

Answer 2

Explanation:

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An organic compound ‘X’ is a liquid at room temperature. It is also a very good solvent and has the molecular formula C2 H6 O. on oxidation ‘X’ gives ‘Y’ which give, break effervescence on reacting with NaHCO3. X reacts with Y in the presence of conc.H2SO4to give another compound ‘Z’ which has a pleasant smell. Identify X, Y