Complete the sentences with the words in the box.

1. This substance is _____________in water and it means that the spot will not disappear unless you use special washing powder.

2. This group _______________ many small subgroups.

3. All chemical elements have already been __________________ by the scientists.

4. When I tasted the soup I felt strange ____________________ taste of citric acid.

5. As we studied more patient cases, the _____________ of the disease became clear.

6. If you rub an apple for a long time, you will see the ______________________ on its surface producing a greasy film.

7. If you keep to the basic safety rules in the laboratory, this may ________________ accidents.

8. The substance underwent many radical _____________________ after all the reactions.

9. It is well known that water doesn’t _________________________ electricity.

10. We know that many bacteria _________________________ in this environment.

6. Are these statements true (T), false (F)? Write true sentences.

1. Chemists study the physical and chemical properties of the substances. (T/F)

__________________________________________________________________________

__________________________________________________________________________

2. There are 111 elements existing on the Earth. (T/F)

__________________________________________________________________________

__________________________________________________________________________

3.Chemistry comprises such fields as inorganic chemistry, organic chemistry, biochemistryetc. (T/F)

__________________________________________________________________________

__________________________________________________________________________

4. Acids turn red litmus blue and contain one or more of the hydroxyl groups. (T/F)

____________________________________________________________________

____________________________________________________________________

5. Oxidation is the action between an acid and a base to form a salt and water. (T/F)

____________________________________________________________________

____________________________________________________________________

6. Lipids are made of many aminoacids linked together. (T/F)

____________________________________________________________________

____________________________________________________________________

7. Polysugars are represented with ribose, glucose, galactose. (T/F)

____________________________________________________________________

____________________________________________________________________

8. Lipids are found in all living things that are greasy and insoluble in water. (T/F)

_________________________________________________________________________

_________________________________________________________________________

9. Proteins are separated into groups based chiefly on physical properties. (T/F)

____________________________________________________________________

____________________________________________________________________

10. Waxes are complex substances found in various tissues of the brain and nervous system.

(T/F)

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Speaking

Read the text again. Answer these questions.

1. What is chemistry?

____________________________________________________________________

____________________________________________________________________

2. What are elements?

____________________________________________________________________

_________________________________________________________________________

3. What properties do elements possess?

__________________________________________________________________________

__________________________________________________________________________

4. What fields of chemistry do you know and what are they?

__________________________________________________________________________

__________________________________________________________________________

5. What are the main classes of inorganic compounds?

__________________________________________________________________________

__________________________________________________________________________

6. Name the acids you know.

__________________________________________________________________________

__________________________________________________________________________

7. What are the properties of the bases?

__________________________________________________________________________

__________________________________________________________________________

8. What are proteins? Name the proteins you know. What functions do they perform?

__________________________________________________________________________

__________________________________________________________________________

9. What are carbohydrates? Name the carbohydrates you know. What functions do they perform?

__________________________________________________________________________

__________________________________________________________________________

10. What are lipids? Name the lipids you know. What functions do they perform?

__________________________________________________________________________

__________________________________________________________________________

8. What facts can you present to your group about:

chemistry, the periodic table, chemical elements, acids, bases, salts, oxides, lipids, proteins, carbohydrates?

Date _______________________ Signature _____________________

DRUGS. ADMINISTRATION OF DRUGS. CHEMIST’S SHOP

Self-study section №2: “Drugs”

Warm-up