University of New Zealand.
Junior Scholarship Examination.
Chemistry.
(Three Hours allowed for this Paper.)
1. |
Explain, with equations, the action of heat on the following compounds:—CaCO
3, H
2CrO
4, H
3PO
4, NaHCO
3, KHSO
4, MnO
2, AuCl
3, FeSO
47H
2O, H
2SO
4, H
2O. |
2. |
Show, with equations, the action of chlorine on the following bodies:—HgO, P, Ca(HO)
2, KHO, KI, H
2O, H
2S, Sn. |
3. |
In what respects do chlorine bromine and iodine resemble each other? |
4. |
State what you know of the allotropic forms of carbon. |
5. |
Describe fully, using equations, the process for manufacturing ammonia from the ammoniacal liquor of gasworks. |
6. |
Show how phosphoric acid is manufactured from bones. |
7. |
State what you know of the chlorides of mercury—their names, formulas, vapour-density, manufacture, properties, tests. |
8. |
Describe, with equations, the chemical changes that take place in the blast furnace. |
9. |
Explain, giving the equations, how aluminium is manufactured on the large scale. |
10. |
Write down three equations for making H
2S; and show by equations the action of that gas on acid solutions of salts of the following metals:—Cu. Bi, Hg, As, Sb, Sn, Pb, Cd. |
11. |
A solution containing nitrates of silver, copper, iron, and calcium is put into your hands. How would you separate the metals so as to get each of them on a different filter paper? |
12. |
Describe a process for extracting silver from silver-bearing galena. |