CH3CH2OH→PCC X ;   CH3CH2OH→CrO3+H2SO4 Y ;  X and Y respectively are

PCC is useful in controlled oxidation. Primary alcohols give aldehydes;X is CH3-CHO;CrO3+H2SO4 is Jone's reagent. It oxidizes primary alcohols to carboxylic acids;Y is CH3-COOH ;