X is an organic compound made up of carbon, hydrogen and oxygen only. The table below records the observations from three chemical tests on X. Reagent added and observation: - Na(s): effervescence - Na$_2$CO$_3$(s): effervescence - hot H$^+$/Cr$_2$O$_7^{2-}$(aq): remains orange What could be a possible structure of X?
Chemistry 9701 · AS & A Level · Carboxylic acids and derivatives