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← ScienceWhich outcome occurs when an alkyne molecule undergoes catalytic hydrogenation?
A)Formation of solely cis-alkenes
B)Production of only trans-alkenes
C)Preferential formation of cycloalkanes
D)Formation of saturated alkanes✓
💡 Explanation
Hydrogenation saturates carbons; the alkyne undergoes reduction via the surface-catalyzed **syn addition**, therefore the process completely saturates to form alkanes rather than stopping at alkene isomers because both pi bonds are susceptible to reduction.
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