Final answer:
Catalytic hydrogenation of alkenes results in the formation of alkanes. Platinum or nickel catalysts are commonly used for this reaction.
Step-by-step explanation:
Catalytic hydrogenation of alkenes results in the formation of alkanes. In this reaction, the double bond of the alkene is broken and hydrogen atoms are added to each carbon. The catalyst used for this reaction is typically platinum (Pt) or nickel (Ni). For example, if you catalytically hydrogenate ethene (C2H4), you will obtain ethane (C2H6).