The electronegativity values of `C, N, O` and `F` on Pauling scale:

Options

A. decrease from carbon to fluorine.
B. increase from carbon to fluorine.
C. increase upto oxygen and then decrease upto fluorine.
D. decrease from carbon to nitrogen and then increase continuously.

Answer

To determine the electronegativity values of Carbon (C), Nitrogen (N), Oxygen (O), and Fluorine (F) on the Pauling scale, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Elements**: We are looking at the electronegativity values for Carbon (C), Nitrogen (N), Oxygen (O), and Fluorine (F).

2. **Know the Electronegativity Values**: The electronegativity values on the Pauling scale for these elements are:
- Carbon (C): 2.5
- Nitrogen (N): 3.0
- Oxygen (O): 3.5
- Fluorine (F): 4.0

3. **Analyze the Trend**:
- As we move from left to right across the periodic table, the electronegativity generally increases. This is because the atomic size decreases, leading to a stronger attraction between the nucleus and the bonding electrons.

4. **Conclusion**: The trend in electronegativity values from Carbon to Fluorine is an increase:
- C < N < O < F
- Therefore, the electronegativity values increase from Carbon (2.5) to Fluorine (4.0).

### Final Summary:
- The electronegativity values on the Pauling scale are:
- Carbon (C): 2.5
- Nitrogen (N): 3.0
- Oxygen (O): 3.5
- Fluorine (F): 4.0
- The trend shows an increase in electronegativity from Carbon to Fluorine.