A mixture of ethyl alcohol and water is homogeneous while that of oil and water is heterogeneous. Why?

Explanation

To understand why a mixture of ethyl alcohol and water is homogeneous while a mixture of oil and water is heterogeneous, we can analyze the properties and behaviors of these substances when mixed.

### Step-by-Step Solution:

1. **Definition of Homogeneous and Heterogeneous Mixtures**:
- A homogeneous mixture has a uniform composition throughout, meaning the components are evenly distributed and cannot be easily distinguished from one another.
- A heterogeneous mixture has a non-uniform composition, where the different components can be seen as separate phases or layers.

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