296 REPORT—1890. 
(8) Experimental Sciences '—viz. (a) the elements of inorganic 
chemistry; (0) electricity, magnetism, heat and light . 2,000 
(4) Physical geography and geology, chiefly economic . : 2,000 
Class ITT. 
(1) English composition tested by the power of writing an essay or 
letter . c : 5 : ; C ‘ : 3 £00 
(2) Drawing, freehand . ; : 5 ; . . 3 500 
(8) Drawing, geometrical. : . 2 ; ; ; 5 500 
Of these subjects (in addition to the Obligatory Mathematics) candidates will 
not be allowed to take up more than four, exclusive of those in Class III., nor will 
they be allowed to take up more than one from Class II.; but they may, in addi- 
tion, take up all the subjects in Class III. There will be a practical Examination 
on subjects 3 (a) and (4), and 4 of Class II. 
InorGANIC CHEMISTRY. 
1. Describe an experiment to show that sulphuretted hydrogen gas contains 
an amount of hydrogen which, if free, would have a volume equal to its own. 
Under what conditions will sulphur and hydrogen unite to form sulphuretted 
hydrogen ? 
2. Give a short description of the manufacture of sulphuric acid (oil of vitriol). 
What is the composition of the so-called ‘ chamber crystals’? 
3. 20 litres of air are led through baryta water and yield a precipitate of 0-5 
gram of baric carbonate. What is the percentage by volume of carbon dioxide 
present in the sample of air? 
[Barium =137. Carbon=12. 11:16 litres of hydrogen weigh 1 gram.] 
4, What is the effect of heat upon the following compounds respectively :-— 
(a) Mercuric nitrate; (6) Ammonic nitrate; (c) Potassic nitrate ? 
Give equations for the decompositions which take place. 
5. Describe the preparation of silicon fluoride, and give an equation to explain 
the chemical change which occurs in your process. 
What action takes place when this gas comes in contact with water ? 
6. How does the ordinary yellow phosphorus differ from amorphous phosphorus? 
How may they be converted, the one into the other ? : 
7. From what source is iodine generally obtained? Describe its preparation. 
How would you distinguish between a piece of iodine and a piece of graphite ? 
8. How much ‘ pyrolusite’ (manganese dioxide) must be decomposed by heat 
to yield sufficient oxygen to convert 160 grams of sulphur into sulphur dioxide ? 
[Manganese =55. Sulphur =32.] 
9. What is the action of zinc and hydrochloric acid on an aqueous solution of 
sulphur dioxide P 
10. Explain the phenomenon known as the ‘spheroidal state of water.’ How 
is the boiling-point of a liquid affected by variations in the atmospheric pressure ? 
PRACTICAL CHEMISTRY. 
[N.B.—In writing out the results you obtain you are expected to state every 
experiment in the order in which it was performed, and to underline the results which 
you rely upon to prove the conclusions you arrive at. 
*,* If you use symbols in writing out your results, marks will be deducted for 
any errors which occur in them. | 
1. Find the two metals present in the alloy A.? 
2. Analyse the simple salts B* and C.? 
3. Find the acid which is in combination with sodium in the compound D.? 
1 Subjects (a) and (0) are alternative; a candidate will not be allowed to take 
up both. 
2 These substances were as follows :—A, alloy of zinc and tin; B, lead nitrate ; 
€, strontium carbonate ; D, sodic hyposulphite. 
