Define organic and mineral acids

In general, organic acids are weak acids and do not dissociate completely in water, whereas the strong mineral acids do. Lower molecular mass organic acids such as formic and lactic acids are miscible in water, but higher molecular mass organic acids, such as benzoic acid, are insoluble in molecular (neutral) form.

will this help?

c is the answer because when something is left after something evaporates that shows the chemical change.

all eukaryotic cell have mitochondria : )