Question: 4. The image below shows a mixture of polar and nonpolar molecules. What type of intermolecular force is shown by the dashed yellow line? Ionic Dipole-dipole Dipole-induced dipole London dispersion Graph: center, a chemical-interaction diagram showing several colored polar and nonpolar molecules with $\delta^+$ and $\delta^-$ labels; a dashed yellow line connects a polar red molecule to a nearby purple molecule.
1. **Problem Statement:** Identify the type of intermolecular force represented by the dashed yellow line connecting a polar molecule (with $\delta^+$ and $\delta^-$ partial charges) to a nearby nonpolar molecule.
2. **Key Concepts:**
- **Ionic forces** occur between ions with full charges.
- **Dipole-dipole forces** occur between two polar molecules.
- **Dipole-induced dipole forces** occur when a polar molecule induces a temporary dipole in a nearby nonpolar molecule.
- **London dispersion forces** are weak forces present between all molecules due to temporary fluctuations in electron density.
3. **Analysis:**
- The dashed yellow line connects a polar molecule (with permanent dipole) to a nonpolar molecule.
- This suggests the polar molecule is inducing a dipole in the nonpolar molecule.
4. **Conclusion:**
- The intermolecular force shown is a **dipole-induced dipole** interaction.
**Final answer:** Dipole-induced dipole