Which reagent is used for the selective hydrogenation of alkynes to alkenes?

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Question: Which reagent is used for the selective hydrogenation of alkynes to alkenes?

Options:

Correct Answer: Pd/BaSO4

Solution:

Pd/BaSO4 is used as a catalyst for the selective hydrogenation of alkynes to form alkenes.

Which reagent is used for the selective hydrogenation of alkynes to alkenes?

Which reagent is used for the selective hydrogenation of alkynes to alkenes?

Step 1: Understand that alkynes are a type of hydrocarbon with a triple bond between carbon atoms.
Step 2: Know that hydrogenation is a chemical reaction where hydrogen is added to a compound.
Step 3: Realize that we want to convert alkynes (with triple bonds) to alkenes (with double bonds) using hydrogen.
Step 4: Identify that a catalyst is needed to speed up the hydrogenation process without being consumed.
Step 5: Learn that Pd/BaSO4 (palladium on barium sulfate) is a specific catalyst used for this reaction.
Step 6: Conclude that using Pd/BaSO4 allows for the selective hydrogenation of alkynes to form alkenes without fully saturating them to alkanes.

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