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