Higher Chemistry Starter Questions PD-PD Interactions

What causes permanent dipole–permanent dipole interactions between molecules?

• Temporary dipoles caused by electron movement

• Attraction between partial positive and partial negative charges

• Sharing of electrons between atoms

• Ionic bonds between ions

Which molecule would exhibit permanent dipole–permanent dipole interactions?

• Cl₂

• CO₂

• HCl

• CH₄

Which of the following is TRUE about molecules with permanent dipole–permanent dipole forces?

• They must be non-polar

• They always contain hydrogen bonding

• Their polar bonds are arranges asymmetrically around the molecule.

• They have only London dispersion forces

Which property is typically higher in compounds with permanent dipole–permanent dipole interactions compared to those with only London forces?

• Melting point

• Color

• Density

• Solubility in non-polar solvents

Which of the following pairs both exhibit permanent dipole–permanent dipole interactions?

• CH₄ and CO₂

• HCl and CH₃Cl

• N₂ and O₂

• F₂ and Ne

Why does hydrogen chloride (HCl) exhibit permanent dipole - permanent dipole interactions?

• Chlorine is more electronegative than hydrogen, creating permanent dipoles.

• Both atoms share electrons equally

• HCl is non-polar

• HCl forms hydrogen bonds

Which intermolecular force is stronger than permanent dipole–permanent dipole interactions?

• Ionic bonding

• Hydrogen bonding

• London dispersion forces

• Covalent bonding

Which molecule below would have the weakest intermolecular forces?

• CH₃Cl

• HCl

• HF

• CCl₄

Why do polar molecules tend to have higher boiling points than non-polar molecules of similar size?

• Polar molecules have stronger ionic bonds

• Polar molecules have stronger covalent bonds

• Polar molecules have stronger intermolecular forces

• Polar molecules have weaker intermolecular forces

Which of these molecules does NOT exhibit permanent dipole–permanent dipole interactions?

• CH₃Br

• H₂O

• CO₂

• HCl