"Dry HCl is not acid". How do you prove it?

What is transpiration? How do you prove it by means of a activity?

"The particles of matter have forces acting between them that keep the particles together." - How do you prove this statement ?

How do you prepare polyester?

Answer the following question : How do you prove that earthworm respond to stimulus?

When HCl reacts with zinc. Which gas will evolved ? How can you prove it ?

How do you measure rainfall?

How do you observe paramecium ?

How do you prove the Fermentation?

You are given two sets such that a set is not a subset of the other. If you have to prove this , how do you prove?