Which type of intermolecular force is the strongest between molecules of CH3Cl?

• A. London dispersion forces
• B. Dipole-dipole interactions
• C. Hydrogen bonding
• D. Ion-dipole interactions

Answer: (B)

Verified step by step guidance

1. Identify the molecular structure of CH\_3Cl (chloromethane). It consists of a methyl group (CH\_3) bonded to a chlorine atom.
2. Determine the polarity of the molecule. Since chlorine is more electronegative than carbon and hydrogen, the C-Cl bond is polar, making CH\_3Cl a polar molecule with a permanent dipole moment.
3. Review the types of intermolecular forces: London dispersion forces (present in all molecules), dipole-dipole interactions (between polar molecules), hydrogen bonding (requires H bonded to N, O, or F), and ion-dipole interactions (between ions and polar molecules).
4. Since CH\_3Cl is polar but does not have hydrogen bonded to N, O, or F, hydrogen bonding is not possible. Also, there are no ions present, so ion-dipole interactions do not apply.
5. Conclude that the strongest intermolecular force between CH\_3Cl molecules is dipole-dipole interactions, which are stronger than London dispersion forces for this molecule.