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

Explanation

To identify whether the given mixtures are homogeneous or heterogeneous, we need to understand the definitions and characteristics of each type of mixture.

### Step-by-Step Solution:

1. **Understand the Definitions**:
- A **homogeneous mixture** has a uniform composition throughout. The components are mixed so well that they cannot be distinguished from one another. Examples include solutions like saltwater or air.
- A **heterogeneous mixture** has a non-uniform composition. The individual components can be seen and separated physically. Examples include mixtures like salad or sand and iron filings.

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