Answer:
Ethane
Explanation:
Hydrogenation reaction is the addition of hydrogen across double and triple bond.
Ethyne is an alkyne that means have one triple bond.
When ethyne is treated with hydrogen in the presence of catalyst such as nickel, palladium or platinum, first ethene is formed.
[tex]C_2H_2+H_2\rightarrow C_2H_4[/tex]
Ethene has one double bond and hence further undergoes hydrogenation reaction to form ethane.
[tex]C_2H_4+H_2\rightarrow C_2H_6[/tex]
