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Alkali metals are highly reactive elemen...

Alkali metals are highly reactive elements. Explain, why?

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Assertion (A): Alkali metals do not occur in native state. Reason (R ): Alkali metlas are highly reactive elements.

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Alkali metals exhibit only +1 oxidation state. Explain.

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ICSE-THE s - BLOCK ELEMENTS-SHORT ANSWER TYPE QUESTIONS
  1. What is photoelectric effect? State t he result of photoelectric effec...

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

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

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

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  5. Why are alkali metals not kept under water?

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

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

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

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

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  10. Why does the basic strength of the hydroxides of alkali metals increas...

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  11. Name the chief factor responsible for the anomalous behaviour of lithi...

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  12. The elements of group 2 are called alkaline earth metals. Give reason.

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  13. The atomic radii of alkaline earth metals are smaller than those of th...

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  14. Why are the second ionisation energies of alkaline earth metals much s...

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  15. Among alkaline earth metals which element do you expect to be least el...

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  16. Why do alkaline earth metals have higher melting points than group 1 e...

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  17. Inspite of much higher second ionisation energy as compared to the fir...

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  18. Comment on the colour and magnetic behaviour of dipositive ions of gro...

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  19. Why do alkaline earth metals and their compounds impart characteristic...

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  20. Giving suitable reasons, arrange alkaline earth metals in the increasi...

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