( vii) Cannizzaro reaction Aldehydes which do not have any α – hydrogen atom, undergo self oxidation and reduction( disproportionation) reaction on treatment with concentrated alkali.
( viii) Electrophilic substitution reaction Aromatic aldehydes and ketones undergo electrophilic substitution. Carbonyl group shows + R effect, therefore acts as a deactivating and meta directing group.
( ix) Baeyer- ViLLiger oxidation With Caro ‟ s acid( H2SO5) or per benzoic acid( C6H5CO3H) or peracetic acid( CH3CO3H) aliphatic ketones give ester.
( xi) Knoevenagel reaction It involves condensation between active methylene group and, carbonyl groups in the presence of base.