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ICSE-THE s - BLOCK ELEMENTS-SHORT ANSWER TYPE QUESTIONS
- What are s-block elements ? Write their general electronic configurati...
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- Why does the first element of a group differ from the other elements o...
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- What is diagonal relationship? Mention two diagonally related pairs of...
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- What is the cause of diagonal relationship ? Explain with examples.
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- Why are group 1 elements called alkali metals ?
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- Why is each alkali metal atom largest in its period ?
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- Why do ionic radii of alkali metals increase on moving down the group ...
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- Why do alkali metals possess low densities?
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- How do the ionisation enthalpies of alkali metals vary on moving down ...
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- Why are the second ionisation enthalpies of group 1 elements much high...
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- 'Each alkali metal is the most electropositive element in its period'....
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- Why do alkali metals not show variable oxidation states ?
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- Why do alkali metals show characteristic colours in a non luminous fla...
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- Sodium readily formsNa^(+)ion but never forms Na^(2+) ion. Explain.
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- Why are the alkali metal ions colourless and diamagnetic ?
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- What is photoelectric effect? State t he result of photoelectric effec...
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- Why are potassium and caesium rather than lithium used in photoelectri...
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- Alkali metals are highly reactive elements. Explain, why?
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- What happens when alkali metals are exposed to air ?
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- Why are alkali metals not kept under water?
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