They can be synthesized by the McFadyen-Stevens reaction and the Nef reaction, and aromatic examples of them are created by the Gattermann-Koch reaction. Reacting an ester or a nitrile with DIBAL-H and hexane will produce them, and they can be detected by the formation of a "silver mirror" when exposed to Tollen's reagent. 
They can be synthesized by the McFadyen-Stevens reaction and the Nef reaction, and aromatic examples of them are created by the Gattermann-Koch reaction. Reacting an ester or a nitrile with DIBAL-H and hexane will produce them, and they can be detected by the formation of a "silver mirror" when exposed to Tollen's reagent. They can also be prepared by oxidizing a primary alcohol with potassium dichromate and sulfuric acid, though using a secondary alcohol will give a ketone instead. Such properties are characteristic of, FTP, what class of organic compounds with a terminal carbonyl group, whose simplest member has formula CH2O?
They can be synthesized by the McFadyen-Stevens reaction and the Nef reaction, and aromatic examples of them are created by the Gattermann-Koch reaction.
{Aldehydes}