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.

[Q]: Ninhydrin forms a Schiff base with this chemical, resulting in a hue known as Ruhemanns purple. The Birch reduction takes place in a liquid substrate of it, the reason it is common in methamphetamine labs. The Kjeldahl method uses this molecule as an end-product to measure the amount of nitrogen in a sample, and it is oxidized in the first step of a nitric acid forming procedure, the Ostwald process. For 10 points, name this weak base found in fertilizers, formed by combining hydrogen and nitrogen in a three-to-one ratio in the Haber process.
[A]: Science


[Q]: Home to the last Barbary Macaque population in the whole of Europe, it joined the EU in 1973, but is a continuing source of diplomatic rows between two of its member states, also because of its role as an international tax haven. Its current status dates back to the 1713 treaty of Utrecht. During the Second World War, the German army devised the Operation Felix to capture this site that acted as an important and strategic British garrison and stronghold, but abandoned it subsequently. Its name is supposed to be derived from Arabic, meaning mountain of Tariq, and in Greco-roman mythology, it was known as one of the Pillars of Hercules. FTP, what is this site, famous for its rock, controlling the entry to the Mediterranean
[A]: History


[Q]: This chemical physicist produced a theory of the change in specific heat with temperature, a method for X-ray diffraction analysis using powdered crystals, and the concept of permanent molecular dipole moments. He was also able to use his moments to show that water was bent and benzene was flat. In 1923 he and Huckel devised a theory of electrolytes that bear their names. FTP name this Dutch-American physicist after whom the unit of electric dipole moment is named.
[A]:
Science