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CHEMISTRY CH11 Atomic Structure — Science STD 9 — Question

Tamilnadu BoardEnglish MediumSTD 9ScienceCHEMISTRY CH11 Atomic Structure2 Marks
Question
Group 1 (except hydrogen) elements are called alkali metals.
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Answer

The elements of group 1 (except hydrogen) are metals. They react with water to form solutions that change the colour of a vegetable dye from red to blue. These solutions are said to be highly alkaline or basic. Hence they are called alkali metals.

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