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: In the Corey-Bakshi-Shibata catalyst, an atom of it is attached to a pyrrole ring, an oxygen atom, and a toluene group. This element's acids are combined with amines and ketones in the Petasis reaction and in combining alkyl halides through the Suzuki coupling. Complexes containing it are called sido or arachno according to Wade's rules, and a more famous reaction using it is sometimes named for Herbert Brown. Mined from the ore Uletite, its silicate was once used in making hard glass for manufacturing laboratory equipment. For 10 points, name this element that participates in an anti-markonikov addition reaction to alkenes, with atomic number 5 and symbol B.

SOLUTION: Science

PROBLEM: General Herr, who had raised the alarm prior to this battle about the decision to remove all emplaced guns smaller than 75mm, spent most of it in the Caures Woods following the "Trommelfeuer. " Historical debate exists about the veracity of the "Christmas Memo" of Falkenhayn regarding this battle, which saw a heroic stand at Fort Souville. It saw a massive supply operation from Bar-le-Duc along the (*) "Sacred Way," and turned when Robert Nivelle crucially recaptured Fort Douaumont. The Somme offensive was partially launched to relieve this attack, which saw the Germans pushed back to the banks of the Meuse. Lasting nearly a year across 1916, FTP, identify this World War I battle occuring at a site that also names an 843 treaty which divided Charlemagen's empire.

SOLUTION: History

PROBLEM: One equation for discovering this value multiplies the masses of two objects over the radius squared multiplied by this force's universal constant. When this weakest of the four fundamental forces is equal to the drag force on an object, that object will be at a terminal velocity. An object's weight is equal to mass multiplied by this force. For 10 points, name this force that acts as a downward acceleration on an object on Earth at 9.8 meters per second squared, which was studied by Isaac Newton possibly because of an apple.

SOLUTION:
Science