In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Not easily oxidized, these compounds can be synthesized by using an organolithium reagent on a nitrile, followed by hydrolysis of the product. Useful as solvents and flavorings, they can also be made by oxidizing a secondary alcohol. They do not affect Fehling's solution and do not react with the Tollens reagent, which differentiates them from aldehydes. FTP, name this class of compounds with a carbonyl group between two aryl groups, the simplest of which is acetone.
Science