Which among the following has lowest boiling point?

Options

A. `O_(2)`
B. `N_(2)`
C. `F_(2)`
D. Ne

Answer

To determine which substance has the lowest boiling point among the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept**: The boiling point of a substance is influenced by its molecular weight. Generally, the lower the molecular weight, the lower the boiling point.

2. **Identify the Options**: Let's assume the options provided are:
- Option 1: O2 (Oxygen)
- Option 2: N2 (Nitrogen)
- Option 3: F2 (Fluorine)
- Option 4: Ne (Neon)

3. **Calculate the Molecular Weights**:
- For **O2**: Each oxygen atom has an atomic weight of 16. Therefore, O2 = 2 × 16 = **32**.
- For **N2**: Each nitrogen atom has an atomic weight of 14. Therefore, N2 = 2 × 14 = **28**.
- For **F2**: Each fluorine atom has an atomic weight of 19. Therefore, F2 = 2 × 19 = **38**.
- For **Ne**: Neon has an atomic weight of 20.

4. **Compare the Molecular Weights**:
- O2 = 32
- N2 = 28
- F2 = 38
- Ne = 20

5. **Identify the Lowest Molecular Weight**: Among the calculated molecular weights, N2 (28) is the lowest, followed by O2 (32), Ne (20), and F2 (38).

6. **Determine the Substance with the Lowest Boiling Point**: Since lower molecular weight corresponds to a lower boiling point, we find that **Neon (Ne)** has the lowest boiling point among the options provided.

7. **Final Answer**: The substance with the lowest boiling point is **Neon (Ne)**.