Санкт-петербургского государственного университета высшее профессиональное образование т. А. Степанова, И. Ю. Ступина
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1.... many years indium was regarded as a laboratory curiosity. 2. There are several methods ... extracting ... indium ... its ores. 3 .... one ... the methods... obtaining indium, indium-bearing zinc is treated... dilute H;S04. 4. Indium exhibits properties characteristic... the aluminium group. 5. Indium bums ... air ... a blue flame. 6. If indium is heated ... the presence ... halogens or sulphur, direct combination takes place. 7 each case indium is ... its highest oxidation state. 8. Only the halides, InX3, arc stable ... the presence ... water. 9. Most indium compounds are soluble ... water. 10. Indium lies... iron and tin ... the electromotive series. 11. Characteristic spectral blue lines ... indium occur... 451.1тц and 410.1 т ц . Ex. 9. a) Mind: No article is used before nouns denoting some branch of science, the names of chemical elements and the word school. Examples: 1. My younger sister goes to school. 2. While at school 1 liked chemistry best. 3. Indium has an clcctrodc potential of -+0.336 volt. b) Translate the sentences into English. 1. В университете мы изучаем математику, химию, физику, исто рию и английский язык. 2. Он не любит математику. 3. Она препода ст общую химию. 4. В школе мне нравился английский язык. 5. Ка кие предметы тебе нравились в школе? 6. Какие оценки у тебя были по химии? 7. Фтор — самый интересный из галогенов, так как он самый активный. 8. Моя сестра ходит в школу, больше всего ей нра вится русская литература. 9. Индий не встречается в больших коли чествах. 10. Некоторые элементы, такие, как кальций, железо, маг ний, играют важную роль в жизни живых организмов. 11. В природе бром встречается реже, чем хлор и фтор. 73 Ex. 10. Translate the scntcnccs into Russian, paying attention to the subjunctive mood. 1. There would be no life without such elements as carbon, oxygen, hydrogen, ctc. 2. It is ncccssary that the substanccs be pure. 3. The tcachcr suggested that the equation of the reaction be written on the blackboard. 4. The solution is diluted lest it be very strong. 5. They would do it once more if they had time. 6. The condition was made that the reaction should procccd slowly. 7. He should have told us about the new time-table. 8. She should have done it yesterday but she didn't know that her results were not accurate. 9. Heating or cooling would affect the state of water, but not its composition. 10. Dry gas would occupy less volume. 11. It would be difficult to find a more abundant element than oxygen. 12. The corrosion would procccd much more rapidly in the presence of oxygen. 13. Wc would begin the calculation but wc have no all the ncccssary data. 14. You should have known that these arc inflammable substanccs. 15. They should have described the properties of the substanccs that were obtained. 16. It would be true to say that experiment is the foundation of chcmistry. 17. The new apparatus would have given more accurate results. 18. It is essential that water should be turned into vapour. 19.1 wish she were right. 2 0 .1 should have asked the tcachcr but I could not comc to the seminar. 21. They suggest that the experiment be started at once. Ex. 11. Translate the scntcnccs into English. 1. Индий встречается в природе в очень незначительных количе ствах. 2. Свойства индия характерны для элементов III группы. 3. Ин дий горит на воздухе и образует окисел 1п20 3. 4. Большинство соеди нений индия растворимы в воде. 5. Разбавленная соляная кислота реагирует с индием с выделением водорода. 6. Уксусная кислота не растворяет индия. 7. Спектральный анализ показывает характерные для индия синие линии. Ex. 12. Make up questions to the italicized parts of the scntcnccs. 1. Indium lies between iron and tin in the electromotive series (2). 2. Two reactions are possible with concentrated sulphuric acid (3). 3. Several methods of extracting indium from its ores arc possible (2). Ex. 13. Answer the following questions: I . What is the occurrence of indium in nature? 2. What properties docs indium exhibit? 3. What can you say about commercial applications of indium? 4. What kind of oxide docs indium form? 5. What compounds of indium and the halogens arc known? 6. In what way docs indium react with sulphuric acid? 7. What docs the spcctral analysis show? жүктеу/скачать 5,96 Mb. Достарыңызбен бөлісу:
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