Hydrogenation of alkenes yields

Options

A. Alkanes
B. Alkynes
C. Aldehydes
D. Carboxylic acids

Answer

**Step-by-Step Solution:**

1. **Understanding Hydrogenation**: Hydrogenation is a chemical reaction that involves the addition of hydrogen (H₂) to an unsaturated compound, typically alkenes or alkynes. This process converts unsaturated compounds into saturated compounds.

2. **Identifying the Reactants**: In this case, we are focusing on alkenes, which are unsaturated hydrocarbons characterized by at least one carbon-carbon double bond (C=C).

3. **Reaction Process**: When an alkene undergoes hydrogenation, the double bond is broken, and hydrogen atoms are added to the carbon atoms that were involved in the double bond. This results in the formation of a saturated hydrocarbon.

4. **Product Formation**: The product of the hydrogenation of an alkene is an alkane, which is a saturated hydrocarbon with single bonds only (C-C).

5. **Evaluating the Options**:
- **Option 1: Alkanes** - This is correct since hydrogenation of alkenes yields alkanes.
- **Option 2: Alkynes** - Incorrect, as hydrogenation does not yield alkynes from alkenes.
- **Option 3: Aldehydes** - Incorrect, as hydrogenation does not yield aldehydes from alkenes.
- **Option 4: Carboxylic Acids** - Incorrect, as hydrogenation does not yield carboxylic acids from alkenes.

6. **Conclusion**: The correct answer to the question "Hydrogenation of alkenes yields" is **alkanes**.

**Final Answer**: Hydrogenation of alkenes yields **alkanes**.

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