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Why Cs is considered as the most electro...

Why Cs is considered as the most electropositive element?
Lithium cannot be used in making photoelectric cells.
Lithium does not form alums

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Due to its lowest ionization energy, Cs is considered as the most electropositive element
Lithium cannot be used in making photoelectric cells because out of all the alkali metals,it has highest ionization energy and thus cannot emit electrons when exposed to light.
Due to small size, lithium does not form alums.
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FULL MARKS-ALKALI AND ALKALINE EARTH METALS-Additional Questions Solved
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  2. How would you explain the following observations? (i) BeO is almost...

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  3. Why Cs is considered as the most electropositive element? Lithium c...

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  4. Give the important uses of the following compounds. i) NaHCO(3) ...

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  5. The hydroxides and carbonates of sodium and potassium are easily solub...

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  6. Why is LiF almost insoluble in water, whereas LiCl soluble not only in...

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  7. Which out of the following can be used to store an alkali metal? ...

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  8. Explain in what respects lithium is different from other metals of the...

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  9. Describe about the biological important of sodium and potassium.

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  10. Compare the properties of beryllium with other elements of the same gr...

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  11. List out the uses of magnesium

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  12. Distinguish between alkali metals and alkaline earth metals.

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  13. State as to why (a) Alkali metals show only +1 oxidation state ...

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  14. An alkali metal (A) belongs to period number II and group number I rea...

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  15. Describe solvay process (or) how is washing soda ( or) sodium carbonat...

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  16. How is sodium hydroxide prepared commercially from brine solution?

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  17. Why alkali metals and alkaline earth metals are called s-block element...

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  18. Why group 1 elements are called alkali metals?

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  19. Which is the radioactive element in group 1 element? What is its half-...

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  20. Alkali metals are stored under oil. Give reason.

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