Question

Molecules that possess only London dispersion forces will have roughly the same melting points.

TRUE

FALSE

Answer 1

False. LDF forces affect Boiling Point, not melting point.

Answer 2

Answer: False

Step-by-step explanation:

Non polar molecules possess dispersion forces due to momentary shifts in the electron cloud of the molecule. The molecular mass is important in deciding the extent of London dispersion forces. The greater the relative molecular mass, the greater, the greater the degree of London dispersion forces and vice versa. The greater the degree of London dispersion forces, the greater the melting and boiling points. Since all molecules possessing London dispersion forces do not all have the same relative molecular mass but widely different relative molecular masses, they cannot all have roughly the same melting point.