A compound which leaves behind no residue on heating is

one of the following liquids will leave hbehind a residue on heating this one is :

Select the correct answer from the following: A salt which leaves yellow residue on heating :

A. Potassium nitrate B. Lead nitrate C. Ammonium nitrate. Choose the chemicals from A, B and C to answer the following questions when they are heated. (a) The chemical which leaves behind no residue. (b) The chemical which gives oxygen as the only gas. (c) The chemical which produces nitrogen dioxide.

Which of the following leaves no residue on heating ?