Senior Examination Papers, 1878. 
EXAMINATION IN CHEMISTEY. 
Maximum Number of Marks, 200. Pass Number, 100. 
I. General Chemistry. 
Wednesday, April 24ith,from 10 a.m. till 1 p.m. 
1. In what respect does a solution of a salt (say nitre) in water 
resemble a chemical compound, and in what does it differ from one ? 
2. Describe the preparation of sulphurous acid gas (1) from sulphur, 
(2) from sulphuric acid, and explain the chemistry of the processes. 
Give an account of the chief characters of that gas. How can you 
distinguish it from hydi-ochloric acid ? What is its action on ferric 
chloride ? 
3. Show by a comparison of compounds what other elements are 
most nearly allied to (1) phosphorus, (2) iodine, (3) manganese. 
4. What weight of caustic soda is required to neutralise exactly 210 
grains of sulphuric acid ? What quantity of bicarbonate of soda will 
also neutralise that quantity of acid? (C:S:0:Na=12:32:16: 23.) 
5. Describe and explain the artificial preparation of nitre. 
6. Describe, and explain the cause of, ebullition. If you want to 
determine accurately the boiling-point of a liquid such as ether, 
explain how you would proceed, and give reasons for the precautions 
you would take. 
7. Explain the chemical changes which go on in the alcoholic 
fermentation. State the circumstances which appear necessary in 
order to this fermentation. What other kinds of fermentation are 
there besides the alcoholic, and in what respects do they resemble it ? 
8. By what tests can you detect (1) iron, (2) aluminum, (3) 
calcium phosphate, in a solution ; separately, and when they are 
altogether ? 
9. What is the composition of urea? How can you prove the 
presence in it of each of the elements you name ? What decom- 
position does it most readily undergo, and under what circumstances ? 
II. Agricultural Chemistry. 
Wednesday, April 24i/i, from 2 p.m. till 5 p.m. 
1. Compare the ccmposition of light sandy soils with that of heavy 
clay soils, and show in what manner the chemical and physical 
characters of light and heavy soils affect their cultivation. 
