Question

A white solid is flammable and dissolves in hexane. Would you expect this compound to be organic or inorganic?

Answer 1

if it soluble in hexane the most probable it is a non-polar compound. Most of the inorganic compounds are ionic (polar) they can be soluble or little soluble in water. But most of the organic compounds with carbon chains longer than 5-6 carbons will be soluble in hexane.

"Then if it is flammable, most inorganic compounds are not flammable. The combustion reaction, which is the chemical formula describing how something burns, is fairly limited - it takes a hydrocarbon plus oxygen in the presence of heat or a spark to turn into carbon dioxide and water. Since inorganic compounds typically do not have both carbon and hydrogen in them, it is not possible for them to burn and they are not flammable. However, they can be extremely reactive and generate heat and light energy - a good example of this is watching pure sodium being exposed to water."
http://www.answers.com/Q/Why_are_inorganic_compounds_flammable