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Why do ionic radii of alkali metals incr...

Why do ionic radii of alkali metals increase on moving down the group ?

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Why does the basic strength of the hydroxides of alkali metals increase on moving down the group ?

How does the hydration energy of alkali metal cations vary on moving down the group ?

How do the ionisation enthalpies of alkali metals vary on moving down the group and why?

Assertion :- Solubility of alkali metal hydroxide increases on moving down the group. Reason :- On moving down the group, hydration energy increases and lattice energy decreases.

Why does the solubility of alkaline earth metal sulphates decrease on moving down the group?

The stability of peroxide and superoxide of alkali metals increase as we go down to group. Explain giving reason.

Due to inert pair effect, the stability of +2 oxidation state increases on moving down the group 14. Why?

On moving down the group 13 density

The density of alkali metals increases from Li to Cs.

The atomic and ionic radii of alkali metals are the smallest in their respective periods.

ICSE-THE s - BLOCK ELEMENTS-SHORT ANSWER TYPE QUESTIONS
  1. Why are group 1 elements called alkali metals ?

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  2. Why is each alkali metal atom largest in its period ?

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  3. Why do ionic radii of alkali metals increase on moving down the group ...

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  4. Why do alkali metals possess low densities?

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  5. How do the ionisation enthalpies of alkali metals vary on moving down ...

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  6. Why are the second ionisation enthalpies of group 1 elements much high...

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  7. 'Each alkali metal is the most electropositive element in its period'....

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  8. Why do alkali metals not show variable oxidation states ?

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  9. Why do alkali metals show characteristic colours in a non luminous fla...

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  10. Sodium readily formsNa^(+)ion but never forms Na^(2+) ion. Explain.

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  11. Why are the alkali metal ions colourless and diamagnetic ?

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  12. What is photoelectric effect? State t he result of photoelectric effec...

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  13. Why are potassium and caesium rather than lithium used in photoelectri...

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  14. Alkali metals are highly reactive elements. Explain, why?

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  15. What happens when alkali metals are exposed to air ?

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  16. Why are alkali metals not kept under water?

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  17. Why are lithium halides partially covalent ? Explain with examples.

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  18. Give a reason for each of the following: Alkali metals are good red...

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  19. Inspite of very high ionisation energy, lithium is the strongest reduc...

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  20. Why are the solutions of alkali metal atoms in liquid ammonia blue col...

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