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]: It holds only when the molecular attraction between different components is equal to the attraction of any one component in its pure state. Dealing primarily with changes in colligative properties, it allows for the calculation of molecular weights of dissolved substances and leads to the definition of a solution as ideal. FTP, identify this law that relates the vapor pressure and mole fraction of a solution, a law named for its French discoverer.
[EX A]: Science

[EX Q]: This man gives his name, along with that of Francis Sears, to a process in ultrasonic imaging for which the acoustic wavefronts act as optical gratings to diffract the light on either side of the central spot. The distance over which charge carriers in plasmas exclude electric fields via his namesake shielding is also known as his namesake length. With an assistant later famous in his own right for his rule for determining whether ring molecules would show aromatic properties, he developed a mathematical expression to explain characteristics of electrolytic solutions, the famous equation named for him and Erich Hckel. FTP name this man who also gives his name to the SI unit defined as about 3.3 x 10-30 Coulomb meters, which measures the molecular dipole moment.
[EX A]: Science

[EX Q]: Elliott Antokoletz argues that a certain treaty inspired this composer's "expansion in range" technique in his third string quartet, which begins with sections called "prima parte" and "seconda parte" and introduced his namesake pizzicato. He wrote a work based on a colinda in which nine sons are turned into stags, while another piece opens with a group of "Unison Melodies" and ends with six pieces dedicated to Harriet Cohen. This composer of Cantata Profana wrote a work parodying Shostakovich's "invasion" theme in the "intermezzo interrotto" fourth movement and wrote a collection of 153 instructional piano pieces titled Mikrokosmos. He wrote an opera ending when Judith opens the seventh door of the title location to uncover the three former wives of her husband. For 10 points, name this composer of Concerto for Orchestra and Duke Bluebeard's Castle who collected Hungarian folk songs.
[EX A]:
Fine Arts