Explain the use of hydrogen in the formation of vegetable fats.

Explanation

**Step-by-Step Solution:**

1. **Understanding Hydrogenation**: Hydrogen plays a crucial role in the process of hydrogenation, which involves the addition of hydrogen to unsaturated organic compounds. This process is significant in the food industry, particularly in the production of vegetable fats.

2. **Vegetable Oils**: Vegetable oils, such as coconut oil and groundnut oil, are primarily unsaturated fats. This means they contain one or more carbon-carbon double bonds (C=C) in their molecular structure.

3. **Process of Hydrogenation**: To convert these unsaturated vegetable oils into solid fats, hydrogen gas is introduced into the oil. This is typically done in the presence of a catalyst, such as nickel, and at elevated temperatures (around 473 Kelvin).

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