Some N-substituted Derivatives of Aldehydes and Ketones
( iii ) Reduction Aldehydes and ketones are reduced to primary and secondary alcohols respectively by sodium borohydride ( NaBH4 ) or lithium aluminium hydride [ LiAlH4 ].
( iv ) Oxidation Aldehydes get easily oxidised to carboxylic acids by HNO3 , KMnO4 , K2Cr2O7 , etc ., or even by mild oxidising agent .