Учебно-методическое пособие по английскому языку для вузов. Кислякова Н.В - 13 стр.

V. Compose the sentences, using the following words and word combinations.
1. importance, of, plant, a, form, medical, diverse, constituents, group.
2. must, the, for, the, plant, methods, extraction, of, vary, constituents, which,
used, are.
3. are, straight, the, compounds, acids, chain, fatty, common.
4. by, fatty, are, the hydrolysis, acids, the, prepared.
5. the, seed, vegetable, in, occur, the, oils, mainly, of, embryo.
6. are, in, soda, phenols, caustic, readily, aqueous, soluble.
7. plants, are, widely, phenolic, in, substances, distributed.
8. alcali, in, tannins, alcohol, soluble, are, dilute, water.

VI. Say whether these statements are right or wrong.
1. Scientists don`t have problems connected with the storage, drying of materials.
2. Fatty acids form soaps, the sodium or potassium salts.
3. Fats and waxes are esters of the saturated acids.
4. The simpler phenols aren`t soluble in water.
5. Phenols are soluble in aqueous caustic soda.
6. Tannins are simple substances.

VII. Insert the missing words given below.
(readily; plant constituents; chemical compounds; glycosidic; ordinary
temperatures; unsaturated acids)
1. Plant constituents represent a diverse group of ... showing the variation in
solubility and stability.
2. The ... may be classified as follows: fatty acids, fats, waxes, etc.
3. Fixed oils, fats and waxes may be either liquid or solid at ....
4. The amount of ... is indicated by the iodine value.
5. Phenols are ... soluble in aqueous caustic soda.
6. Tannins appear to be ... in nature.



VIII. Ask questions about the text and answer them working in pairs.




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