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CBSE COMPLEMENTARY MATERIAL-s-BLOCK ELEMENTS -1-MARK QUESTIONS
- What is the oxidation state of K in KO(2) ?
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- Why group -1 elements are called alkali metals ?
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- LiCl is soluble in organic solvent. Why ?
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- Alkali metals are strong reducing agents.
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- Arrange the following in order of the increasing covalent character: ...
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- Explain why can alkali and alkaline earth metals not be obtained by ch...
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- Why Be and Mg do not give characteristics colour to the flame ?
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- Why do alkaline earth metals not form any superoxide ?
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- Why gypsum is added to cement ?
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- How plaster of paris is obtained from gypsum ?
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- What is quick lime ? How is it prepared ?
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