Select conductors of electricity from the following : Copper wire, silk thread, pure water, acidulated water,human body, glass, mercury.

Answer

To solve the question of selecting the conductors of electricity from the given options, we will analyze each item based on its properties related to electrical conductivity.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- Copper wire
- Silk thread
- Pure water
- Acidulated water
- Human body
- Glass
- Mercury

2. **Define Conductors**: Conductors are materials that allow the flow of electric current due to the presence of free electrons or ions.

3. **Analyze Each Option**:
- **Copper Wire**: Copper is a metal and has free electrons, making it an excellent conductor of electricity.
- **Silk Thread**: Silk is an insulator and does not have free electrons, so it does not conduct electricity.
- **Pure Water**: Pure water (H2O) does not contain free ions and is considered an insulator.
- **Acidulated Water**: Acidulated water contains ions (like H+) which can move freely, allowing it to conduct electricity. Therefore, it is a conductor.
- **Human Body**: The human body contains a significant amount of water and electrolytes, which allow it to conduct electricity. Thus, it is a conductor.
- **Glass**: Glass is an insulator and does not have free electrons, so it does not conduct electricity.
- **Mercury**: Mercury is a metal and has free electrons, making it a good conductor of electricity.

4. **List the Conductors**: From the analysis, the conductors of electricity from the given options are:
- Copper wire
- Acidulated water
- Human body
- Mercury

### Final Answer:
The conductors of electricity from the given options are:
- Copper wire
- Acidulated water
- Human body
- Mercury

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