35 
8. Describe one of the methods used in determining vapour- 
densities. 
9. The analysis of an organic body, containing carbon, hydrogen, 
and nitrogen gave the following numbers : — 
Substance burnt - 0*2050 grains. 
Carbonic acid (C 0 2 ) found - - 0*3017 „ 
Water found - - 0*2457 „ 
The density of the vapour of the substance referred to hydrogen 
as unity was found to be 29. 
What are the composition and formula of the compound ? 
The following equivalents to be used : — . 
Hydrogen 1 
Carbon 6 
Nitrogen - - - - 14 
Give details of calculation. 
10. A gi ven sample of malt contains 60 per cent, of starch, and 
10 per cent, of glucose (C 12 , H 12 , 0 12 ). Assuming that the whole 
of the starch and glucose is converted into alcohol, how much 
malt, expressed in pounds avoirdupoise, ounces, and grains, would 
be necessary to produce one gallon of absolute alcohol at 1 5° 5 C 
(60° F) ? 
The specific gravity of alcohol, water being taken as unity = 
0*7938 at 15° 5 C. (60° F). 
The gallon of water at 15° 5 C (60° F) weighs 70,000 grains. 
J 1. Describe the preparation of fulminate of mercury, and give 
the composition of this substance. 
12. Give an outline of the process of saponification, and of the 
manufacture of soap. 
The practical examination consists in the qualitative analysis 
of a mixture of several mineral acids and bases, of which the 
following are some examples : 
1. Sesquioxide of Iron. 
Protochloride of Mercury. 
Nitrate of Barium. 
Silica. 
Sulphate of Copper. 
2. Sesquioxide of Iron. 
Acetate of Lead. 
Citric Acid. 
Chromate of Potassium. 
3. Sesquioxide of Iron. 
Protochloride of Mercury. 
Sulphate of Magnesium. 
Nitrate of Silver. 
4. Sesquioxide of Iron. 
Nitrate of Barium. 
Sulphate of Copper. 
Chloride of Manganese. 
Arsenious Acid. 
5. vSesquioxide of Iron. 
Sulphate of Magnesium. 
Nitrate of Barium. 
Nitrate of Cobalt. 
Nitrate of Silver. 
c 2 
