Classify the following substances as either being a homogenous or heterogenous mixture?
(1) Sugar + Water
(2) Sand + Water
(3) mixture of different pulses
(4) Air in the atmospheric column
(5) Soda
(6) Alloys

Explanation

To classify the given substances as either homogeneous or heterogeneous mixtures, we will analyze each one based on the definition of these terms.

### Step-by-Step Solution:

1. **Sugar + Water**:
- When sugar is dissolved in water, it forms a sugar solution. This solution has a uniform composition throughout, meaning that every part of the solution has the same ratio of sugar to water.
- **Classification**: Homogeneous mixture.

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