Calendar: 1867-1868 Page 496

APPLIED SCIENCES 497 extracted from them Give the tests for zinc For what bodies is it most likely to be mistaken How may it be distinguished from them Sketch the process of copper smelting and state by what tests the presence of copper in solution may be ascertained What compounds does silver form with chlorine Describe the process of extracting the metal from the ordinary chloride FIRST YEAR -A How may oxygen be extracted from atmospheric air What proportion of the atmosphere does it form Mention its leading properties Classify the principal oxides What chemical changes occur when coals are burned in an open fire How are these changes modified when the supply of air is limited State the principal results obtained by heating ordinary Newcastle coal in iron retorts Sketch the process of making and purifying coal gas Describe the preparation of nitric acid and give the tests by which nitrate in solution may be recognised What oxides of nitrogen maybe obtained Describe the preparation and properties of the compound which contains least oxygen Describe the method of procuring chlorine What are its chief properties How is chloride of lime obtained Mention its most important practical uses specifying tbe mode in which it is applied Distinguish between chloride of lime and chloride of calcium FIRST YEAR -B What are the principal sources from which the salts of ammonia are procured Specify how it may be obtained in the gaseous form Give its composition by weight and by volume with the mode of proving the accuracy of your statements What is the principal source of bromine Describe its preparation and properties How may hydrobromic acid be obtained