In dehydration reaction , highly substituted alkene is the major product and if the major product is capable of showing cis-trans isomerism , transproduct is the major product . ( Saytzeff ’ s rule ).
( iii ) Oxidation reactions Oxidising reagents used for the oxidation of alcohols are neutral , acidic or alkaline KMnO4 and acidified K2Cr2O7 .
A common reagent that selectively oxidises a primary alcohol to an aldehyde ( and no further ) is pyridinium chlorochromate ( pCC ).
( iv ) Dehydrogenation