Imagini ale paginilor



Those who take French and Science will write on Section A only. Those who take the Science Option will write on both sections.

Answers to Chemistry questions are to be put in one book; those to Physics in another.


I. What is the Law of Multiple Proportions? On what experimental basis is it founded? Show that compounds that yield the following results on analysis conform to the law.

I. As. 75.75, O. 24.24; II. As. 65.21, O. 34.78. Show work.

II. Write the equations that will indicate the chemical actions in the following cases: Carbonate of sodium is treated with dilute hydrochloric acid and the gas that comes off is led through a solution of lime in water until the precipitate that is first formed is entirely dissolved, then some caustic soda is added to the clear solution and a white precipitate is formed.

III. Solve the following with your class: If 10 grams of ice (specific heat=0.5) at -10°C. are placed in 100 grams of water at 19.4°C, and the resulting temperature is 10°C., find the latent heat of fusion of ice.

IV. Give the construction, principle and use of the Ruhmkorff Induction Coil.


V. Solve the following with your class: What changes in the velocity of sound transmitted by the air accompany (i) an increase in temperature when the pressure of the

air remains constant, (ii) a rise in the barometer when the temperature of the air remains constant? fully.


VI. Conduct with your class an experiment to illustrate total reflection of light, explaining the phenomenon.

VII. Why is hydrogen not obtained from zinc and nitric acid? Mention two other similar cases of chemical action. Write equations to show what occurs when zinc and nitric acid act toegther.

VIII. If a strong solution of ammonium chloride be boiled in a flask, and one piece of litmus paper be dropped into the flask while another piece is hung over its mouth, the former will turn red and the latter blue. What explanation applies to this observed result?




Note.-Candidates who take French and Science will write on Part I of this paper.

Part I.

1. The subject of the lesson is The Law of Definite Proportions.

(a) Indicate the necessary preliminary experiments.. (b) Explain the application you would make of these experiments.

(c) What result would you expect the class to have gained from your teaching?

2. A solution of ammonium carbonate is divided into two parts, one of these is treated with hydrochloric acid, the other with a solution of sodium hydroxide. The colorless gases that pass off are led into the same beaker of


(a) Indicate by proper symbols the ions in the various mixtures of solutions, and the combinations of these ions into molecules.

(b) How would you answer a pupil who enquired how the ammonium carbonate can react with both an acid and an alkali, as above?

3. How would you proceed to teach a class the solution of the following problem? Make clear the points you consider important:

Find what volume of hydrogen chloride at 27°C. and 800 mm. pressure can be obtained from one kilogram of sodium chloride, by using excess of sulphuric acid.

4. A pupil gives you the answer: "Temperature is the

amount of heat in any body." How would you proceed? Give the questions you would ask and the answers you would expect.

Part II.

5. Why should Biology form part of the curriculum of the Lower School? What would you expect your pupils to gain from this course in Biology?

6. Outline your first lesson on the grasshopper with Form I. How many lessons would you devote to this animal? What information would you expect your class to have at the conclusion of these lessons?

7. Outline your treatment of the mushroom with Form II. In the outline give the information you would expect your class to have as a result of the teaching.

8. The subject of your lesson with a Junior Teachers' class in Polarization,-what it is, and its effect on the current.

Conduct the necessary experimental work with your class, and direct them so they may secure the information you desire them to have. State this information in your


[ocr errors]



Biology and Physics.

1. (a) A pupil asks, "Why do some fruits open to discharge seed, while others do not?" How would you answer him?

(b) How would you introduce the topic, 'Weeds,' to a Lower School class?

2. Outline an Upper School lesson on the Life History of a Fern.

3. Describe your method of dealing with the crayfish with a Lower School class. State the information you would expect the class to have at the conclusion.

4. The subject of the lesson for the Upper School is Feathers, (i) Their structure, (ii) Their arrangement, (iii) Their uses and adaptation to these uses. How would you conduct the lesson? State the information the pupils are expected to obtain from the lesson.

[ocr errors]

5. You are in charge of a Lower School laboratory class in Physics where you have only two or three sets of apparatus. Discuss:

(a) Your grouping of pupils.
(b) Arrangement of exercises.

(c) Method of giving instructions to the class.
(d) Class supervision.

6. The subject of the lesson is the Extra Current. Outline:

(i) The connection with previous work.

(ii) The experiments you would use.

(iii) The information you desire the class to obtain.

« ÎnapoiContinuă »