Prolonged boiling of animal fat with lye is called

Options

A. saponification
B. stain removal
C. ecology
D. conjugation

Explanation

To solve the question "Prolonged boiling of animal fat with lye is called", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Components**:
- Identify what lye is. Lye is a strong alkaline solution, typically composed of sodium hydroxide (NaOH) and potassium hydroxide (KOH).

2. **Identifying the Process**:
- When animal fats are boiled with lye, a chemical reaction occurs. This reaction involves the hydrolysis of fats in the presence of a strong base.

3. **Defining the Chemical Reaction**:
- The process of boiling animal fats with lye leads to the formation of soap and glycerol. This reaction is known as saponification.

4. **Choosing the Correct Term**:
- The term that describes the prolonged boiling of animal fat with lye is "saponification".

5. **Evaluating the Options**:
- The options provided are:
- a) Saponification
- b) Stain removal
- c) Ecology
- d) Conjugation
- Since we have established that the correct term is saponification, we can conclude that option (a) is the correct answer.

### Final Answer:
The answer to the question is **saponification**.

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