1. A piece of metal is given for qualitative analysis,how would you proceed to treat it?

2. A mineral silicate is given for qualitative analysis,how would you proceed to treat it?

3. Give one good method for destroying organic matter in a solution before testing for metals of the ammonia group.

4. Explain any difficulty that may occur in treating with HS, a solution containing (a) arsenic, (b) mercury, (c) lead, (d) iron.

5. The original solution is alkaline,-HCl produces a precipitate,-what may this indicate?

6. Why must the solution to which H2S is added be (a) acid and not alkaline, (b) not too acid, (c) strongly saturated with H2S, (d) warmed.

7. Give details for the treatment of the filtrate from the HS group, explaining difficulties that may be met.

8. How would you prepare a solution for examination for the acid radicals after the bases have been detected?

9. Give one corroborative qualitative test for (a) gold, (b) manganese, (c) magnesium, (d) an acetate, (e) an arsenite, (f) a hyposulphite.

10. How would you distinguish between (a) ferrous and ferric salts, (b) stannous and stannic salts, (c) sulphites and thiosulphates, (d) nitrites and nitrates?

Assaying and Quantitative Analysis.

1. The sample labelled x is handed you by a prospector for report. (a) What would you recommend him to do with it? (b) State method of treatment if an assay is to be made.

2. The sample of copper ore submitted is to be assayed. Outline the method you would adopt and give reasons for adopting this method in preference to any other.

3. The ore labelled "Frontenac" is to be assayed for silver. Give charge, with reasons for using each substance, and indicate difficulties that are to be guarded against.

4. How would you prepare and standardise the necessary solutions for the volumetric zinc assay?

5. Give the "scorifier colors" for the elements iron, manganese, copper, nickel and chromium, when present in

an ore.

6. Describe in detail a process of determining the proportion of carbon dioxide in the atmosphere, mentioning especially the method of taking the sample.

7. (a) What is the composition of the white precipitate obtained in the estimation of magnesia as phosphate? (b) What is its composition after ignition?

8. How would you estimate the percentage of available chlorine in a sample of "chloride of lime"?

9. Write equations for the chemical actions involved in the determination of chlorine as chlorides by titration with silver nitrate, using potassium chromate as indicator.