Unsaturated fats are made saturated by

Options

A. Polymerisation
B. Hydrogenation
C. Dehydrogenation
D. Hybridisation.

Answer

To answer the question "Unsaturated fats are made saturated by," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Unsaturated Fats**:
- Unsaturated fats contain one or more double bonds between carbon atoms in their fatty acid chains. This structure makes them liquid at room temperature.

2. **Understanding Saturated Fats**:
- Saturated fats, on the other hand, have no double bonds; all carbon atoms are fully saturated with hydrogen atoms. This structure makes them solid at room temperature.

3. **Identifying the Process**:
- To convert unsaturated fats into saturated fats, we need to eliminate the double bonds. This is typically done through a chemical process.

4. **Chemical Process Involved**:
- The process that converts unsaturated fats to saturated fats is called **hydrogenation**. This involves adding hydrogen atoms to the unsaturated fat, which converts the double bonds into single bonds.

5. **Mechanism of Hydrogenation**:
- During hydrogenation, hydrogen gas is added to the unsaturated fat in the presence of a catalyst, such as nickel, palladium, or platinum. The addition of hydrogen reduces the double bonds, resulting in the formation of saturated fats.

6. **Conclusion**:
- Therefore, the correct answer to the question is that unsaturated fats are made saturated by **hydrogenation**.

### Final Answer:
Unsaturated fats are made saturated by **hydrogenation**.

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