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: 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.

SOLUTION: Science

PROBLEM: In one of this artists canvases, models for his most famous painting are shown dressing in front of that painting. For other, he replaced his own self-portrait with a pot of flowers in the background of a painting of his mistress, Madeliene Knoblock. This painter of Poseuses and Young Woman Powdering Herself was educated at the cole des Beaux-Arts, but helped to form the Society of Independent Artists after panels from his Bathing at Asnires were rejected by the Paris Salon. His most famous style was developed with the artist of The Port of Saint-Tropez, Paul Signac; he eventually used this style to depict Parisians, along with a monkey and two dogs, relaxing in a riverfront park. Name this Neo-Impressionist artist known for his use of pointillism in his masterpiece, A Sunday Afternoon on the Island of La Grande Jatte. "

SOLUTION: Fine Arts

PROBLEM: The eastern shore of this island features Tintingue Bay, which is across from the much smaller Nosy   Boraha Island. Its southwest coast is known for its spiny thickets, and its west coast includes the port  of Mahajanga and is near Juan de Nova Island. Some of the islands northwest of this one include   Mayotte, Comoros, and the Glorioso Islands. This island is the native home of lemurs, and islands  further off its east coast include Mauritius and Reunion [rayn-yaw]. Name this island home of the  nation whose capital is Antananarivo, located between the Mozambique Channel and Indian Ocean  off the east coast of Africa.

SOLUTION:
Social Science