instruction:
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.
question:
During this dynasty, the minister Qin Gui committed an infamous act of treachery against the general Yue Fei, and the author of the Comprehensive Mirror for Aid in Government, Sima Guang, opposed the New Laws of Wang Anshi. Zhao Kuangyin formed it, and gunpowder, the magnetic compass, and moveable type were invented during this era, before the death of emperor Qinzong led to the decline of its Northern period, but its southern incarnation survived until the Mongol conquest. For 10 points, name this dynasty is credited with unifying China after the Ten Kingdoms and Five Dynasties periods.
answer:
History

question:
Rosenheim and Callow developed a test in which a mixture of this compound and metal acetates are used to detect the presence of sterols. Millon's reagent is a solution of mercury in this substance and a similar substance, which turns red in the presence of phenolic compounds and is useful in detecting tyrosine residues. The commercial production of this compound begins with the combustion of ammonia using a platinum-rhodium catalyst; that process is the Ostwald process. For 10 points, identify this acid which is found with hydrochloric acid in aqua regia, and has chemical formula HNO3.
answer:
Science

question:
His long campaign to win Livonia eventually met failure at the hands of Stephen Bathory, but he did conquer Kazan and Astrakhan and made the first Russian inroads into Siberia. The son of Vasily III, his reign was characterized by his struggles with the boyars, leading him to call the first national assembly, the zemski sobor, and establish his own state called Oprichnina within Russia. After the death of his first wife Anastasia in 1560 he experienced a decline in emotional stability which is the source of his current fame. FTP, who was this first czar of Russia, known as * "the Terrible"
answer:
History