Noble gases are named because of their inertness towards reactivity. Identify as incorrect statement about them.

Options

A. Noble gases have weak dispersion forces
B. Noble gases have large positive values of electron gain enthalpy
C. Noble gases are sparingly soluble in water
D. Noble gases have very high melting and boiling points

Answer

To identify the incorrect statement about noble gases, let's analyze the provided statements one by one:

1. **Noble gases have weak dispersion forces.**
- This statement is **correct**. Noble gases exhibit weak Van der Waals forces (dispersion forces) due to their monatomic nature.

2. **Noble gases have large positive values of electron-gain enthalpy.**
- This statement is **correct**. Noble gases have a stable electronic configuration, and adding an electron would require energy, resulting in a positive electron-gain enthalpy.

3. **Noble gases are sparingly soluble in water.**
- This statement is **correct**. Noble gases are non-polar and do not interact well with polar water molecules, making them sparingly soluble.

4. **Noble gases have high melting and boiling points.**
- This statement is **incorrect**. Noble gases actually have low melting and boiling points compared to other elements with similar atomic masses due to their weak dispersion forces.

### Conclusion:
The incorrect statement about noble gases is: **"Noble gases have high melting and boiling points."**

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