Decantation can be used to separate

Options

A. sugar from sugar solution (solid dissolves in the liquid)
B. two miscible liquids, i.e., which mix with each other, like alcohol and water.
C. two immiscible liquids, i.e., liquids which do not mix together like oil and water
D. solid-solid mixture

Answer

**Step-by-Step Solution:**

1. **Understanding Decantation**: Decantation is a separation technique used to separate components of a mixture, particularly when dealing with liquids. It is primarily used for separating two immiscible liquids, which means liquids that do not mix with each other.

2. **Identifying Immiscible Liquids**: Immiscible liquids have different densities. For example, oil and water are immiscible because oil is less dense than water and will float on top of it.

3. **Decantation Process**: The process involves allowing the mixture to settle, where the denser liquid or solid sinks to the bottom, and the less dense liquid remains on top. The less dense liquid can then be poured off carefully without disturbing the denser layer.

4. **Evaluating the Options**:
- **Option 1: Sugar from sugar solution**: This is incorrect because sugar dissolves in water, forming a homogeneous solution. There are no immiscible layers to separate.
- **Option 2: Two immiscible liquids like alcohol and water**: This is also incorrect because alcohol and water are miscible; they mix completely and cannot be separated by decantation.
- **Option 3: Two immiscible liquids like oil and water**: This is correct. Oil and water do not mix, and oil can be separated from water using decantation.
- **Option 4: Mixture of solids**: This is incorrect as decantation cannot be used to separate solids from solids.

5. **Conclusion**: The correct answer is that decantation can be used to separate two immiscible liquids, such as oil and water.

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