Question

A mix of sand and naphthalene are often separated by?

Answer 1

Hint: A mix is made when two or more different substances are physically combined and may be separated back to its original substances. samples of mixtures are: a bowl of various sorts of candy, a pile of various sorts of leaves, steel, syrup . There are two sorts of mixtures.

Complete answer:
A mixture of sand and naphthalene are often separated by sublimation as naphthalene sublimes on heating.
Sublimation is the transition of a substance directly from the solid to the gas state,[1] without passing through the liquid state. Sublimation is an endothermic process that happens at temperatures and pressures below a substance's triple point in its phase diagram, which corresponds to rock bottom pressure at which the substance can exist as a liquid.
The reverse process of sublimation is deposition or sublimation, during which a substance passes directly from a gas to a solid phase. Sublimation has also been used as a generic term to explain a solid-to-gas transition (sublimation) followed by a gas-to-solid transition (deposition).
While vaporization from liquid to gas occurs as evaporation from the surface if it occurs below the boiling point of the liquid, and as boiling with formation of bubbles within the interior of the liquid if it occurs at the boiling point, there's no such distinction for the solid-to-gas transition which always occurs as sublimation from the surface.

Note:
The mixture of naphthalene and common salt are often separated by the method of sublimation as naphthalene may be sublime, i.e. it turns into vapour without changing in liquid and its vapour becomes solid without becoming liquid, while common salt isn't sublime.