Physical properties of ice,water and steam are very different. What is the chemical composition of water in all the three states?

Which of the following undergoes sublimation?

What is the principle of distillation?

In a closed container,there is a mixture of $SO_2$,$CO_2$,and $O_2$ gases. Which sequence of reagents can be helpful to separate them?
$(I)$ Limewater
$(II)$ Acidified potassium dichromate
$(III)$ Alkaline pyrogallol

Which is the best method to separate a mixture of benzoic acid and naphthalene?

Describe the method,which can be used to separate two compounds with different solubilities in a solvent $S$.