Intermolecular Forces - exam practice

they become weaker with increasing chain length of an organic compound

they become stronger with increased branching in organic compounds

they occur between molecules rather than atoms in molecules

in any molecule they are always the weakest intermolecular bond

CH₃CHO

CH₃COOH

CCl₄

CO₂

covalent bonds

hydrogen bonds

permanent dipole-dipole interactions

induced dipole-dipole interactions

hydrogen bonds are stronger in ice than in water

hydrogen bonds hold H₂O molecules apart in ice

ice is a solid but water is a liquid

ice contains hydrogen bonds, but water does not contain hydrogen bonds

NaH

NH₃

HI

SiH₄

covalent bonds < hydrogen bonds < dipole-dipole forces < London forces

dipole-dipole forces < London forces < hydrogen bonds < covalent bonds

London forces < dipole-dipole forces < hydrogen bonds < covalent bonds

London forces < dipole-dipole forces < covalent bonds < hydrogen bonds

PCl₅ molecules have more covalent bonds

PCl₅ has stronger intermolecular forces

PCl₅ molecules have stronger covalent bonds

PCl₅ contains phosphorus with a higher oxidation number

HF

CH₃OH

CH₃F

H₂O₂

water has a less open structure than ice

ice cubes float in a glass of iced water

when water freezes its volume increases

water is a good solvent for ionic compounds

X, Z, Y

Y, Z, X

X, Y, Z

Y, X, Z