Assertion : Temporary hardness can be removed by boiling.
Reason : On boiling the soluble bicarbonates change to carbonates which being insoluble, get precipitated.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are False.

Explanation

**Step-by-Step Solution:**

1. **Understanding Hardness of Water:**
- Hardness in water is primarily due to the presence of dissolved salts, mainly calcium and magnesium.
- There are two types of hardness: temporary and permanent.

2. **Temporary Hardness:**
- Temporary hardness is caused by the presence of bicarbonate salts (e.g., calcium bicarbonate and magnesium bicarbonate).
- These bicarbonates are soluble in water.

3. **Effect of Boiling:**
- When water containing temporary hardness is boiled, the heat causes the soluble bicarbonates to decompose into insoluble carbonates.
- The reaction can be summarized as:
\[ \text{Ca(HCO}_3\text{)}_2 \text{ (aq)} \rightarrow \text{CaCO}_3 \text{ (s)} + \text{CO}_2 \text{ (g)} + \text{H}_2\text{O (l)} \]
- The calcium carbonate (CaCO₃) formed is insoluble in water and precipitates out.

4. **Removal of Hardness:**
- The precipitate formed (calcium carbonate) can be removed by filtration.
- This process effectively reduces the temporary hardness of the water.

5. **Conclusion:**
- The assertion states that temporary hardness can be removed by boiling, which is true.
- The reason explains that boiling converts soluble bicarbonates to insoluble carbonates, which is also true.
- Therefore, both the assertion and reason are true, and the reason correctly explains the assertion.

**Final Answer:**
Both assertion and reason are true, and the reason is a correct explanation of the assertion.

**Correct Option:** Option 1

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