Agricultural Education — Examination Papers, 1871. Ixxxi 
EXAMINATION IN CHEMISTRY. 
Maximum Number of Marks, 200. Pass Number, 100. 
I. General Chemistry. 
Wednesday, April 19th; Morning, 10 a.m. till 1 p.m. 
1. Explain fully one method of determining the proportion of 
ac[ucous vapour present in the atmosphere at any given time. 
2. Describe the preparation of chlorine and of chloride of lime, and 
explain the chemistry of the processes. Give an account of the chief 
characters of those substances. What is the action of carbonic acid on 
the latter? 
3. When two volumes of one gas (a) unite with one volume of another 
gas (b) to produce a compound (o), what is the general relation between 
the volume of c and the volume of a employed to produce it ? Give 
some examples. 
4. Name some common mineral substances containing sulphur, and 
give the chemical formula for each of them. Of what organic sub- 
stances is sulphur a constituent? How can you demonstrate its 
presence in such substances ? 
5. What sort of impurities will a charcoal filter remove from water? 
What explanation do you give of the action of such a filter ? 
6. State in equations, or otherwise, the action of soda, lime, iron, 
and silver-nitrate respectively, with hydrochloric acid. Hence explain 
what is meant by chemical equivalence and quantivalence. 
7. Explain how to find the proportion of carbon in an organic com- 
pound. 4-83 parts of an organic compound containing no nitrogen 
gave 9-23 of C0= and 5-61 of H'O : find its formula. 
8. State the composition of m-ea, and explain how it is readily con- 
verted into ammoniacal salts. 
9. An infusion of malt contains a large quantity of sugar : state what 
variety of sugar it is, and what you know of the action by which it is 
produced. Is the quantity of sugar produced affected by using boiling 
water for the infusion ? Give the reason for your answer. By what 
other means may a production of sugar from grain or other similar 
materials be effected ? 
II. In Agricultural Chemistry. 
Wednesday, April 19t7i ; Afternoon 2 p.m. till 5 p.m. 
1. Contrast the chemical properties of light sandy soils and heavy 
clay-land. 
2. What are the best chemical meaus for raising the fertility of poor 
sandy soils and of heavy clay-soils? 
\or,. VII. — s. s. f 
