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.
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Question: 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.

Answer: Science

Question: In a painting by this artist, a man clad in a striped orange outfit seems to be punching the midsecton of a man in a striped blue outfit in a clearing in the woods. The Football Players was created in 1908, a year after he painted some uncomfortable looking officials on a red platform with a woman clad in red and a lion. The large feline appearing in The Representatives of Foreign Powers Coming to Greet the Republic as a Sign of Peace is not unique in his work, as big cats also appear in The Repast of the Lion and Fight Between a Tiger and a Buffalo. In one of his most famous works, a large lion looks down at the titular woman, who has a pitcher and a stringed instrument. FTP, name this French painter of The Snake Charmer, The Dream, and The Sleeping Gypsy.

Answer: Fine Arts

Question: "The Immediate Erotic Stages or the Musical Erotic," "The Validity of Marriage," "Diapsalmata," "Crop Rotation," and "Shadowgraphs," are included in this study whose first volume identifies its title term as the "aesthetic" phase of existence, while the second volume and corresponding title word refers to the "ethical" phase of existence. These antagonistic phases are in turn superseded by the final or "religious" mode, based on man's decision to enter into a personal relation with God. FTP, identify this 1843 masterpiece best known for the section, "The Seducer's Diary," the first major work of Soren Kierkegaard

Answer:
Social Science