Which type of solid typically has low boiling points and is soluble in non-polar solvents?

Simple molecular lattices are characterized by their structures formed from discrete molecules held together by relatively weak intermolecular forces, such as van der Waals forces or dipole-dipole interactions. These weak forces result in low boiling points because only a small amount of energy is needed to overcome them when transitioning from the solid phase to the liquid phase.

Additionally, simple molecular substances often exhibit solubility in non-polar solvents. This is due to the principle of "like dissolves like," meaning that non-polar molecules can interact effectively with the weak intermolecular forces present in simple molecular solids, facilitating their dissolution.

In contrast, crystalline solids can refer to a broad category of solid structures that might have varying properties, giant covalent lattices are known for their very high melting and boiling points due to the strong covalent bonds throughout the lattice, and ionic compounds generally have high melting and boiling points due to the strong ionic bonds and are typically soluble in polar solvents rather than non-polar ones. Therefore, the characteristics of simple molecular lattices make them the correct choice for the question asked regarding low boiling points and solubility in non-polar solvents.