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1248. What is oil of bitter almonds ? To whai class of bodies does it belong ?

1249. Give a short account of the preparation of a few of the most important coal-tar colours.

AMINES AND AMIDES.

1250. How are amines distinguished from amides?

1251. Describe the preparation of ethylamine, diethylamine, and triethylamine.

1252. Point out the resemblances between ammonia and the amines.

1253. What is the action of ammonia on ethyl iodide and of potash on the product? Give equations.

1254. What is the action of nitrous acid on the amines ? Give an example.

1255. To what class of organic bodies does urea belong? Give reasons for placing it in this class.

1256. How much urea when treated with nitrous acid should evolve 179 c.c. of nitrogen at N.T.P. ?

1257. Give the formula for acetamide. Describe its preparation and reactions.

APPENDIX A.

TABLE OF THE ELEMENTS WITH THEIR
SYMBOLS AND COMBINING WEIGHTS.

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Cr.

Combining Weight.

35.5 52 587 63-5

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95 1126

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Chromium . Cobalt Copper Didymium. Erbium. Fluorine Gallium Gold Hydrogen Indium . Iodine. Iridium.

19 69:8

Ga .

Au.

197

I

H
In

1134

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