cxxxii Agricultural Education — Examination Papers, 1888. 
EXAMINATION IN CHEMISTRY. 
Maximum Numbee op Marks, 200. Pass Number, 100. 
A. General Chemistry. 
Thursday, May 10th, from 10 a.m. till 1 p.m. 
1 . Give an account of the properties of carbon and charcoal. 
2. What are the chief substances in solution in sea-water, 
common spring-water, and rain-water, respectively ? How is water 
from a pond affected by filtering it through a bed of sand 1 
3. How may nitrates be made to yield ammonia ? Calculate the 
weight of ammonia which 1000 grs, of sodium nitrate will yield. 
(Na = 23, N = 14.) 
4. Describe the chemical characters of silica and silicic acid. 
What silicates are soluble in water, and how may they be distin- 
guished from salts of other acids ? 
6. In what substances and in what states of combination does 
sulphur most commonly occur in nature ? How can sulpliites, such 
as sodium and calcium sulphite, be prepared 1 How do you explain 
the antiseptic property of sulphites 1 
6. State the composition, general properties, and mode of pre- 
paration, of caustic potash. Explain its action with copper sulphate 
and ferric chloride respectively. 
7. Explain the chemical nature and distinctive properties of 
copperas, red lead, alumina, pyroligneous acid, paraffin. 
8. State the composition of urea, and explain why it is said to 
be carbamide. What chemical changes does it most readily under- 
go 1 How can it be made artificially ? 
9. What are the chemical relations between cane and grape 
sugar 1 What conditions are requisite for the transformation of sugar 
into alcohol 1 How can absolute alcohol be obtained ? 
