Name the liquid which is commonly used in making thermometers.

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks for the name of the liquid commonly used in thermometers.

2. **Identify the Purpose of a Thermometer**: A thermometer is a device that measures temperature. It is important to know what materials are used in thermometers to understand their function.

3. **Recall Common Liquids Used in Thermometers**: There are a few liquids that can be used in thermometers, but the most common one is mercury.

4. **State the Answer**: The liquid that is commonly used in making thermometers is **mercury**.

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