What type of reaction occurs when alkenes react with hydrogen?

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Question: What type of reaction occurs when alkenes react with hydrogen?

Options:

Correct Answer: Hydrogenation

Solution:

The reaction of alkenes with hydrogen is called hydrogenation.

What type of reaction occurs when alkenes react with hydrogen?

What type of reaction occurs when alkenes react with hydrogen?

Step 1: Identify the reactants. In this case, the reactant is an alkene, which is a type of hydrocarbon with a double bond.
Step 2: Introduce hydrogen gas (H2) to the alkene. This is done under specific conditions, often with a catalyst.
Step 3: The double bond in the alkene breaks. This allows the hydrogen atoms to attach to the carbon atoms that were previously double-bonded.
Step 4: The result is an alkane, which is a saturated hydrocarbon with single bonds only.
Step 5: Name the reaction. This process of adding hydrogen to an alkene is called hydrogenation.

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