Vocabulary. transparent - прозрачный

lustrous - блестящий

transparent - прозрачный

bauxite - боксит

to purify - очищать

pure - чистый

molten - расплавленный

ductile - плавкий, ковкий

manganese - марганец

zinc- цинк

lightness - легкость

abundant - распространенный

liquid - жидкость

corrosion resistance - коррозионная стойкость

work-hardening - механическое упрочнение

deliquescent - растворяющийся

aircraft - самолет

vehicle - транспортное средство

to sublime - сублимироваться

to donate - передавать

cracking - крекинг

oil - масло

overhead power cable - воздушный силовой кабель

Exercise 2. Answer the following questions.

1. How is aluminium extracted?

2.

What are the properties of aluminium?

3. Why is aluminium suitable for variety of uses?

4. How is aluminium chloride prepared?

5. Where is aluminium chloride used?

Exercise 3. Put questions to the bold-typed words.

1. Aluminium chloride is a whitish solid.

2. Alloying element is copper.

3. Strength of any metal can be increased by work-hardening.

4. Aluminium chloride sublimes at 178^o C.

5. Copper oxide is prepared by electrolysis.

6. Aluminium chloride is soluble in water.

7. In the liquid and vapour phases dimer molecules exist.

8. The A1C1₃ molecule can also form compounds.

9. Aluminium chloride is used commercially as a catalyst.

10. Aluminium chloride is also used in certain organic reactions.

11. Pure aluminum is soft and ductile.

12. The metal is protected by a thin transparent layer of the oxide.

Exercise 4. Give the equivalents for the following words and make up sentences with them: copper, zinc, manganese, electrolysis, to exist, to sublime, vehicle, aircraft, work-hardening, corrosion resistance, liquid, to extract, deliquescent, abundant, to increase, conversion, silicon, magnesium.

Exercise 5. Match the following words with the correct definition.

1. Acid rain is a) a chemical used for killing insects.

2. Corrosive substance is b) a material that produces heat when

3. Flammable means it burns.

4. Chlorine is c) a poisonous greenish-yellow gas.

5. Fuel is It has strong smell. It is a non-metal

element.

6. Pesticide is d) a substance that can damage through

chemical action, e.g. stone or metal.

e) fire-catching and easily - burning.

f) rain that contains factory gases that

damage crops and buildings.

7. Citric acid is g)an acid contained in orange or lemon juice.

8. Oxide is h) a chemical element found in rocks and sand.

9. Silicon is i) a compound of oxygen and another chemical

element.

Exercise 6. Give the explanation for the following words: corrosion resistance, electrical conductivity, bauxite, zinc, silicon, liquid.

Exercise 7. Find andcorrect the mistakes in the text based on the text from Ex.1: