All liquids are non-conductor of electricity exeept

Options

A. mobil oil
B. coconut oil
C. glycerine
D. mercury

Explanation

To solve the question "All liquids are non-conductor of electricity except," we need to identify which liquid among the options provided is a conductor of electricity.

### Step-by-Step Solution:

1. **Understanding Conductors and Non-Conductors**:
- Conductors are materials that allow electric current to flow through them.
- Non-conductors (or insulators) do not allow electric current to flow.

2. **Analyzing the Statement**:
- The statement mentions that all liquids are non-conductors of electricity except for one. This implies that there is at least one liquid that can conduct electricity.

3. **Identifying Conductive Liquids**:
- Common examples of conductive liquids include:
- Saltwater (due to dissolved ions)
- Acids (like hydrochloric acid)
- Bases (like sodium hydroxide)
- Mercury (a metal that is liquid at room temperature)

4. **Selecting the Correct Option**:
- Among the options provided, we need to find the liquid that is known to conduct electricity.
- From our analysis, we know that mercury is a liquid metal and is a good conductor of electricity.

5. **Conclusion**:
- Therefore, the correct answer to the question is **Mercury**.

### Final Answer:
The correct answer is **Mercury**.