CONTENTS. Page. EXAMINATION FOR DEGREE OF BACHELOR IN MEDICINE, UNDERGRADUATE HONORS, TRINITY TERM :- Experimental Physics, MODERATORSHIP EXAMINATION, MICHAELMAS TERM:- Mathematics and Mathematical Physics, Experimental and Natural Science, History, Political Science, and English Literature, DUBLIN EXAMINATION PAPERS. 1859. UNDERGRADUATE HONOR EXAMINATION PAPERS. Hilary Term. SENIOR SOPHISTERS. Experimental and Natural Sciences. CHEMISTRY. DR. APJOHN. 1. In what proportions by volume should sulphuretted hydrogen and ammonia be mixed in order to the production of NHS. 2. Explain the methods of insulating ammonia, amidogen, and ammonium. 3. Give the particulars of the process for extracting SH from the terchloride of antimony, and mention the action which this gas exerts on solutions of chloride of copper, chloride of zinc, and sesquichloride of iron. 4. When a metal is dissolved in nitric acid, NO2 is evolved; but, in some cases, it is accompanied by NO. Give in symbols the theory of the production in each experiment of each of these gases. 5. Explain the action of oil of vitriol on fluor spar, of the hydrofluoric on silicic acid, and of fluorilicic gas on water. 6. How with the voltaic eudiometer would you make the analysis of a mixture of marsh gas and nitrogen? 7. If a mixed solution of chloride and bromide of potassium gives with nitrate of silver a precipitate weighing 41 grains, and that this precipitate, when heated in an atmosphere of chlorine, is reduced to 37.81 grains, -the amount of chlorine and of bromine in the original solution may be determined. What are they? 8. Write the formula of the detonating compound obtained by the action of water of ammonia on iodine; give the theory of its production, and an explanation of the action exerted upon it by sulphuretted hydrogen. b 9. Explain the formation of the different products which are obtained when barytic water is boiled upon phosphorus, and at the same time indicate the process by which hypophosphorous acid may be insulated, and the reason why phosphuretted hydrogen, by keeping, ceases to be spontaneously inflammable ? 10. Phosphuretted hydrogen may be obtained by heating either the hydrated phosphorus, or the hydrated hypophosphorous acid. Account in both these cases for its production. II. What are the materials used in the manufacture of oil of vitriol; what are the details of the process, and the theory of it, as given by Regnault? State also the method by which AsO3 and NO3 may be detected in it, and removed. 12. If, upon adding tartaric acid to a solutien of iodide of potassium, this latter acquires a reddish-brown colour, a certain impurity may be inferred to be associated with the salt; what is this impurity, and how is its presence accounted for? For the solution of some of the preceding questions the following data are required : Sp. gr. of sulphuretted hydrogen, Atomic weight of sulphur, Do. do. of nitrogen, Do. do. of chlorine, 35.05 1. For what systems is the choice of the principal axis limited, and in what is it quite arbitrary? 2. In certain systems a crystallographic coincides with an optic axis. What are they? 3. If the angle of a regular octahedron be acuminated, what is the simple form to which such acuminating planes belong, and what is its notation? 4. If in a six-sided prism (interfacial angles = 120°), combined with the terminal plane, the solid angles be replaced by planes unequally inclined to the prismatic faces, what is the simple form to which such planes correspond, and what is its notation? 5. Give the notation of the two oblique prisms characteristic of the oblique prismatic system. HEAT. MR. GALBRAITH. 1. Is it correct to state, as is sometimes done, that the volume of a given I mass of air increases by of its volume for an increase in temperature 492 |