On oxidation, primary alcohols
yield aldehydes with mild oxidising agents and carboxylic acids with strong
oxidising agents while secondary alcohols yield ketones Tertiary alcohols are
resistant to oxidation The presence of –OH group in phenols activates the aromatic ring towards
electrophilic substitution and directs the incoming group to ortho and para
positions due to resonance effect Reimer-Tiemann reaction of phenol yields
salicylaldehyde