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.

[EX 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.
[EX A]: Science

[EX Q]: This equation's accuracy can be improved if used in conjunction with Lorentz-Hudson-McCoubrey combining rules for modeling interactions between unlike molecules. The trace of fluid-solid coexistence curves can be performed by utilizing Kofke's method for this equation's associated integration. This relation can serve as a test for consistency for the Hubbard approximation if the external magnetic field and chemical potential are chosen as its two intensive parameters. The Lewis-Randall rule relates this equation to Henry's Law, and the Clausius-Claperyon equation can be derived from this relation assuming the two phases are in equilibrium. For 10 points, name this doubly eponymous equation that determines the relationship between changes in chemical potential for components in a system, named after a French energeticist and a Yale physicist.
[EX A]: Science

[EX Q]: This author's works of translation influenced his novel which begins with the death of Gaspar Ilom, and deals with the conflict between the Indians, who consider themselves to be the titular figures, and those who merely grow corn. In one of this author's novels, Octavio Sansur attempts to organize a strike. That novel, The Eyes of the Interred, is the last in the (*) "Banana Trilogy", which also includes Strong Wind and The Green Pope. Another novel by this author begins with the Zany killing Colonel Sonriente. Later, General Canales has a heart attack after reading that the titular figure was present at his daughter Camila's wedding and Angelface is arrested. For 10 points, name this author of Men of Maize and El Senor Presidente.
[EX A]:
Literature