Calendar: 1869-1870 Page 546

548 THE SCHOOL By what tests may the following gases be distinguished from each other -Oxygen hydrogen carbonic anhydride nitrous oxide carbonic oxide Give the molecular formula and the relative weight for each How may the purity of each be known How is sulphuretted hydrogen obtained Give tormulae indicating its action upon plumbic oxalate argentic triphosphate cupric nitrate caustic potash and slaked lime Describe the preparation of hydrochloric acid from common salt giving the symbols of the reaction Say how the chlorides bromides and iodides are distinguished from each other when in solution How is potassium prepared Describe its properties What is the mode of obtaining caustic potash Give the tests by which potassium salts are distinguished from those of sodium ammonium and magnesium What means have we of distinguishing lead dyad mercury and silver from each other when in solution Describe the preparation of red lead mercuric oxide mer- curie iodide and vermilion Give the principal distinctive characters of each How are the compounds of arsenic tin and cadmium distinguished from each other when in solution IX fie £ cfiool FOREST SCHOLARSHIP rtefe Ctfitamnit 9cti of tfit 9poitleS Translate Tj di ίπανριον όδοητοροντταν ΐκιίνων και ןךד irSKti ϊγγιζόντων ανίβη Ώίτροϊ ότι ro δωμα προσείζασθαι vtpl ωραν ΐκτην 'Ey