Termez state university “Interfaculties English chair”


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TERMEZ STATE UNIVЕRSITY

«INTERFACULTIES CHAIR OF THE FOREIGN LANGUAGES»

THE FINAL STATE ATTESTATION VARIANT

FOR THE DEPARTMENT OF CHEMISTRY



VARIANT № 1

1. Read and translate the text on specialty in written form:
CHEMISTRY.
        Chemistry is a science of substances, their structure, their properties and the reactions that change them into other substances. Chemistry is a great and complex subject.

       Substances may exist in any of the three states. They may exist as solids, liquids or gases. Sulphur, iron, silver are solids at an ordinary temperature, bromine and mercury are liquids in the same conditions and oxygen and hydrogen are gases. But solid substances may become liquids if we heat them to a proper temperature. Liquids turn into gases at very high temperatures.

Elements and compounds. All substances can be divided into two great classes, namely, elements and compounds.

       An element is an indecomposable substance, all compounds are substances which consist of two or more different substances, so they can be decomposed into two or more simple substances. Compounds are decomposible substances. Water can be decomposed into oxygen and hydrogen.

       Elements may be metallic and non-metallic. Nitrogen and carbon are non-metals, but lead and tin are metals.


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