Identify the following as homogeneous and heterogeneous mixtures.
(i) Alcohol and water
(ii) Sand and iron filings

Explanation

To identify the given mixtures as homogeneous or heterogeneous, we can follow these steps:

### Step 1: Understand the definitions
- **Homogeneous Mixtures**: These are mixtures that have a uniform composition throughout. They consist of a single phase and cannot be separated by physical means.
- **Heterogeneous Mixtures**: These mixtures have a non-uniform composition and consist of two or more distinct phases. They can be separated by physical means.

### Step 2: Analyze the first mixture - Alcohol and Water
- When alcohol is mixed with water, they form a solution that has a uniform composition. The mixture appears the same throughout and does not have distinct layers or phases. Therefore, it cannot be separated by physical means.
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