TASK DEFINITION: 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.
PROBLEM: Halogen addition to them creates a mixture of a 1-2 and 1-4 addition product. One preparation of them involves butane undergoing thermal dehydration. Another synthesis of the conjugated variety of this chemical group involves elimination of unsaturated alcohols and alkyl halides. They include a number of useful reagents, including ones named for Chan, Dane, Brassard, Rawal, and Danishefsky. In addition to the conjugated variety, they also occur in isolated and cumulated varieties. Conjugation energy guarantees that the conjugated form is the most stable. For ten points, what is this organic functional group whose 1,3 variety are a principal reactant in the Diels-Alder reaction, and which is characterized by a pair of double bonds.

SOLUTION: Science

PROBLEM: In one novel by this author, the title character dances with Barbra Flick while choosing not to pursue the tanner Emil Rothfuss's wife. This author of Knulp wrote about Joseph Knecht's pursuit of the role of Magister Ludi in the title intellectual game, and described a journey undertaken with Govinda in search for the Buddha in another novel. This author of The Glass Bead Game wrote about the saxophonist Pablo bringing Hermine to the Magic Theatre, causing Harry Haller to stab her. For 10 points, name this German author of Siddhartha and Steppenwolf.

SOLUTION: Literature

PROBLEM: A three-membered ring containing a cation of this element is nucleophilically attacked by acetate to form a vicinal diol in the Woodward cis-hydroxylation. An acid of this element and oxygen is used to cleave vicinal diols into carbonyls. This element binds to 7 fluorine atoms in a classical example of a pentagonal bipyramidal compound. This is the largest element that can bind to silver in a chemical used in (*) photographic film. Deficiency of this element in the human body leads to an enlarged thyroid, a condition known as goiter. This element is used to test for starch by staining it a blue-black color. The only diatomic element to be solid at room temperature, for 10 points, name this second-heaviest halogen, whose chemical symbol is I.

SOLUTION:
Science