What method can be used for the separation of two volatile liquids that have a significant difference in their boiling points?

What is sublimation? Give its uses and examples.

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ $A$ mixture contains benzoic acid and naphthalene. The pure benzoic acid can be separated out by the use of benzene.
Reason $R:$ Benzoic acid is soluble in hot water.
In the light of the above statements,choose the most appropriate answer from the options given below.

Which of the following is an example of a heterogeneous mixture?

Which of the following substances sublimes upon heating?

Classify matter according to physical state.