Decantation is a better method of separation than filtration.

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Methods**:
- Decantation and filtration are both methods used to separate mixtures.
- Decantation involves pouring off a liquid from a solid that has settled at the bottom, while filtration uses a filter to separate solids from liquids.

2. **Comparison of Effectiveness**:
- Decantation is effective for separating larger solid impurities from a liquid. It works well when the solid has settled and can be easily poured off.
- Filtration, on the other hand, is more effective for removing smaller particles and impurities that may not settle quickly or at all.

3. **Reasoning**:
- Since filtration can remove both small and larger particles (as long as they are larger than the filter's pore size), it is generally considered a more thorough method of separation compared to decantation.
- Decantation may leave behind fine particles in the liquid, which means it is not as effective in purifying the liquid.

4. **Conclusion**:
- Therefore, the statement "Decantation is a better method of separation than filtration" is incorrect.
- The correct statement is that "Filtration is a better method of separation than decantation" because it can remove smaller impurities more effectively.