Which of the following in liquid state can provide lowest temperature 

Options

A. nitrogen
B. Helium
C. oxygen
D. argon

Answer

To determine which of the given substances in liquid state can provide the lowest temperature, we will analyze the boiling points of each substance listed: Nitrogen, Helium, Oxygen, and Argon.

### Step-by-Step Solution:

1. **Identify the substances and their states**: The substances we are considering are Nitrogen (N₂), Helium (He), Oxygen (O₂), and Argon (Ar). We are interested in their liquid states.

2. **Research the boiling points**: We need to find the boiling points of each substance, as the boiling point indicates the temperature at which the substance transitions from liquid to gas. The lower the boiling point, the lower the temperature that can be achieved in the liquid state.
- **Nitrogen (N₂)**: The boiling point of liquid nitrogen is approximately -196°C.
- **Helium (He)**: The boiling point of liquid helium is approximately -269°C.
- **Oxygen (O₂)**: The boiling point of liquid oxygen is approximately -183°C.
- **Argon (Ar)**: The boiling point of liquid argon is approximately -186°C.

3. **Compare the boiling points**: Now that we have the boiling points, we can compare them:
- Helium: -269°C
- Nitrogen: -196°C
- Argon: -186°C
- Oxygen: -183°C

4. **Determine the lowest temperature**: The substance with the lowest boiling point will provide the lowest temperature in its liquid state. From our comparison:
- The lowest boiling point is that of Helium at -269°C.

5. **Conclusion**: Therefore, the substance that can provide the lowest temperature in its liquid state is **Helium**.

### Final Answer:
**Helium provides the lowest temperature in its liquid state.**

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