Gases which turns lime water milky are;

Answer

**Step-by-Step Solution:**

1. **Identify Lime Water**: Lime water is a dilute solution of calcium hydroxide, which is represented by the chemical formula \( \text{Ca(OH)}_2 \).

2. **Understanding the Reaction with Carbon Dioxide**: When carbon dioxide (\( \text{CO}_2 \)) is bubbled through lime water, it reacts with calcium hydroxide to form calcium carbonate (\( \text{CaCO}_3 \)), which is a white precipitate. The reaction can be represented as:
\[ \text{Ca(OH)}_2 + \text{CO}_2 \rightarrow \text{CaCO}_3 \downarrow + \text{H}_2\text{O} \]
The formation of \( \text{CaCO}_3 \) causes the lime water to turn milky.

3. **Understanding the Reaction with Sulfur Dioxide**: When sulfur dioxide (\( \text{SO}_2 \)) is bubbled through lime water, it reacts with calcium hydroxide to form calcium sulfite (\( \text{CaSO}_3 \)), which is also a white precipitate. The reaction can be represented as:
\[ \text{Ca(OH)}_2 + \text{SO}_2 \rightarrow \text{CaSO}_3 \downarrow + \text{H}_2\text{O} \]
This also results in the lime water turning milky.

4. **Conclusion**: Therefore, the gases that turn lime water milky are carbon dioxide (\( \text{CO}_2 \)) and sulfur dioxide (\( \text{SO}_2 \)).

**Final Answer**: The gases which turn lime water milky are \( \text{CO}_2 \) (carbon dioxide) and \( \text{SO}_2 \) (sulfur dioxide).

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