ON TEACHING CHEMISTRY. 291 
assigned, in which must be included one subject from each of the following groups, 
viz. :-— 
(A.)—(1) Greek; (2) Latin; (8) French; (4) German; (5) Italian; 
6) Celtic 
(B.)—(1) Euclid ; (2) Arithmetic; (3) Algebra; (4) Plane Trigonometry ; 
(5) Elementary Mechanics ; (6) Algebra and Arithmetic (Senior Grade). 
In the case of girls, in all grades, it will be necessary and sufficient to pass in 
one subject from group (A), in English, and in any two other subjects of the 
Programme, 
Junior Grade. 
CHEMISTRY. 
(Atomic weights, H=1, 0=16, N=14, Hg =200.) 
1. Nitric acid is added to:—(a) solution of indigo; (4) solution of litmus; 
(c) metallic copper ; (@) solution of caustic potash. Describe the result in each 
case, and explain cases (c) and (d) by equations. 
2. What evidence have we that air is a mature of gases and not a chemical 
compound ? 
8. Given sodium carbonate and hydrochloric acid, how would you prepare a 
quantity of common salt ? 
4, Calculate the weight of oxygen obtainable by heating 432 crams of red oxide 
of mercury. 
5. Howis solution of ammonia obtained ? 
6. What are the chief properties of the substance which is represented by the 
formula NO ? 
7. What is meant by each of the following terms:—Analysis, synthesis, 
element, atomicity ? 
8. Describe an experiment illustrating the law of definite proportions. 
9. Find the formula of the substance whose percentage composition is— 
Hydrogen : 5:0 
Nitrogen : 35:0 
Oxygen : 60:0 
10. Explain the action of plants in purifying atmospheric air. 
Middle Grade. 
CHEMISTRY. 
(Atomic weights :—H =1, 0=16, N=14, K=39, S=82.) 
1. Strong sulphuric acid is heated with (a) metallic copper; (4) common salt ; 
(c) nitre. Explain the changes that occur in each case. 
2. How would you ascertain the presence of free zodine in a solution ? 
3. Carbon dioxide is led (a) into lime-water ; (0) into solution of caustic potash ; 
(c) over red-hot charcoal. What is the result in each case ? 
4, How would you distinguish marsh-gas from hydrogen ? 
5. Crystals of a well-known salt are dissolved in water, and to the solution is 
added a solution of silver nitrate: the mixture remains clear. A fresh quantity of 
the crystals is strongly heated, the residue dissolved in water, and silver nitrate 
solution added; a white curdy precipitate forms, soluble in ammonia, What was 
the salt ? 
6. How is amorphous phosphorus obtained ? 
7, Name the three varieties of the element carbon, and compare their properties. 
8. How could you demonstrate that ammonia gas contains nitrogen ? 
9. Calculate the weight of nitre that must be used in order to afford 10 grams 
of nitric acid. 
10. How may it be shown, experimentally, that ozone is produced during the 
electrolysis of water ? 
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