(I) Oxidation reaction : (O) (O)
1° alcohol → aldehyde → carboxylic acid (O) (O)
2° alcohol→ ketone → carboxylic acid (acid with loss of 1 carbon atom) (O)
3° alcohol→ resistant to oxidation (II) Hydrogenation reaction : give 1° alco
hol → aldehyde
2° alcohol → ketone
3° alcohol → alkene 3
° alcohols prefer to undergo dehydration and form alken