7. (a) What are sulphonic acids, and how prepared? (b) Compare the chemistry of aliphatic amines with that of the aromatic amines.

8. (a) Give structural formulae of the possible monobromnaphthalenes.

(b) What are heterocyclic compounds? examples, using structural formulae.

Give four

SENIOR CHEMISTRY.

Extra-Mural.

(Ten qeustions only to be answered).

1. A liquid is given to you and you are told that it may be a hydrocarbon, an alcohol, an aldehyde, an ether, or an ester. How would you determine which it is? Give in detail the properties of any one of these classes.

2. How can the different amines be distinguished by treatment with nitrous acid? Describe as fully as you can the character of the amines.

3. What is tartaric acid? Show its relation to some other compounds and show how the one can be derived from the other experimentally. How would you prove that tartaric

acid is dibasic?

4. What are the main differences between the aliphatic and the aromatic series of compounds? How do the structural formulae indicate the difference?

5. Compare and contrast the phenols with the alcohols.

6. Discuss some set of compounds having more than one ring similar to benzene in the constitutional formula.

7. Discuss the subject of stereo-isomerism.

8. What is meant by the constant R? Calculate its value for gases and, assuming that its value is the same for dilute solutions, calculate the osomotic pressure of a 2% solution of sugar at any temperature you choose.

9. Suppose
might be used for determining its atomic weight?

a new element were discovered, what methods

10. What is meant by the phase rule? Show that in the case of the system, ice, water, and vapour, if there is only one phase present the system is bivariant or has two degrees of freedom; if two phases are present the system is univariant; if three phases, the system is non-variant.

11. How can the heats of combustion be used to find the heats of combination?

12. What is meant by electrolytic dissociation, and what arguments are there in favour of the theory?

13. Pressure disturbs the point of equilibrium in the dissociation of nitrogen peroxide but not of hydrogen iodide. Discuss the reason for this fact. What happens when one attempts to vary the pressure of dissociating calcium carbonate?

MINERALOGY I.

ARTS AND SCIENCE.

Elementary Mineralogy.

Minerals used as illustrations in one question must not be used in answering another question.

1. Sketch and describe the five models submitted, and give Weiss' and Naumann's symbols for each form present.

2. Describe three minerals that are used as ores of three different metals, respectively.

3. Describe three minerals that occur as gangues for ores of the metals.

4. Describe three rock-forming minerals.

5. Describe in detail the mineral group known as the "plagioclase feldspars."