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

For which one of the following mixtures is composition uniform throughout?

Define mixture and its types.

Which of the following substances consists of only one element?

Give the technique for the separation of the following:
$(i)$ Mixture of sugar and sand
$(ii)$ Mixture of kerosene and water
$(iii)$ Mixture of benzene and common salt
$(iv)$ Mixture of liquids with boiling points $356 \, K$ and $365 \, K$
$(v)$ Mixture of aniline and camphor

How is the pure liquid separated from a mixture obtained by vapour distillation?