Which of the following cannot be further hydrogenated ?

Options

A. Tripalmitin and Triolein
B. Triolein and Tristearin
C. Tristearin and Trilinolein
D. Tristearin and Tripalmitin

Answer

To determine which of the given compounds cannot be further hydrogenated, we need to analyze the saturation of each compound in the options provided.

### Step-by-Step Solution:

1. **Identify the Compounds**:
- We have four options, each containing different fats or oils. For example, triolin, tristeroin, and tripalmitin.

2. **Understand Saturation**:
- Saturated fats contain no double bonds between carbon atoms, while unsaturated fats contain one or more double bonds. Unsaturated fats can be hydrogenated (addition of hydrogen) to become saturated.

3. **Analyze Each Option**:
- **Option 1**: Contains triolin, which is an unsaturated fat. It can be hydrogenated.
- **Option 2**: Also contains triolin, which is unsaturated and can be hydrogenated.
- **Option 3**: Again contains triolin, which is unsaturated and can be hydrogenated.
- **Option 4**: Contains tristeroin and tripalmitin, both of which are saturated fats. Saturated fats cannot be further hydrogenated since they do not have double bonds.

4. **Conclusion**:
- Since options 1, 2, and 3 contain unsaturated fats that can be hydrogenated, the only option that cannot be further hydrogenated is **Option 4**, which contains two saturated fats (tristeroin and tripalmitin).

### Final Answer:
**Option 4**: Tristeroin and Tripalmitin cannot be further hydrogenated.

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