What happens when carbon dioxide gas is passed through lime water ? Write a word equation for this process. Name the type of change which takes place.

Explanation

### Step-by-Step Solution:

1. **Understanding the Reaction**:
- When carbon dioxide (CO₂) gas is passed through lime water (which is a solution of calcium hydroxide, Ca(OH)₂), a chemical reaction occurs.

2. **Formation of Calcium Carbonate**:
- The carbon dioxide reacts with the calcium hydroxide in lime water to form calcium carbonate (CaCO₃). This calcium carbonate is not soluble in water, leading to the formation of a milky solution.

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