When pentane (C5H12) mixes with heptane (C7H16), what type of intermolecular forces must be broken? What type of attractive forces are formed?

A) Dipole-dipole; dispersion
B) Dipole-dipole; Dipole-dipole
C) Dispersion; Dipole-dipole
D) Dispersion; dispersion

D) Dispersion; dispersion

Explanation:

Pentane or heptane are non-polar molecules so both of the , dispersion or london force exists as intermolecular force exists among molecules of pentane or heptane . So these bonds needs to be broken and dispersion  interaction takes place between molecules of pentane and heptane. Dispersion interaction  of AB type is stronger than AA or BB type.

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter