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.