Gelatin has the minimum protective powers.True or false

Answer

To determine whether the statement "Gelatin has the minimum protective powers" is true or false, we can analyze the concept of protective power and the gold number.

### Step-by-Step Solution:

1. **Understanding Protective Power**:
- Protective power refers to the ability of a colloid to prevent the coagulation of another colloid (in this case, gold salt) when a certain amount of electrolyte (like NaCl) is added.

2. **Introduction to Gold Number**:
- The gold number is a quantitative measure of the protective power of a colloid. It is defined as the minimum amount (in milligrams) of a protective colloid required to prevent the coagulation of 10 ml of a gold salt solution when 1 ml of a 10% NaCl solution is added.

3. **Interpreting Gold Number Values**:
- A lower gold number indicates a higher protective power. Conversely, a higher gold number indicates a lower protective power.

4. **Gold Number of Gelatin**:
- The gold number for gelatin is reported to be between 0.005 to 0.01. This is a very low value, indicating that gelatin has a strong protective effect.

5. **Conclusion**:
- Since gelatin has a low gold number, it means it has a high protective power. Therefore, the statement "Gelatin has the minimum protective powers" is false.

### Final Answer:
The statement is **False**.