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Why are potassium and caesium, rather th...

Why are potassium and caesium, rather than lithium used in photoelectric cells?

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Compared to Li, K and cs have lower ionisation energy which makes the release of valence electrons easier in K and Cs.
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A N EXCEL PUBLICATION-THE S-BLOCK ELEMENTS-QUESTION BANK
  1. Compare alkali metals and alkaline earth metals with repect to ionisat...

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  2. Explain why alkali and alkaline earth metals cannot be obtained by che...

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  3. Why are potassium and caesium, rather than lithium used in photoelectr...

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  4. When an alkali metal dissolves in liquid ammonia the solution can acqu...

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  5. Beryllium and magnesium do not give colour to flame whereas other alka...

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  6. Potassium carbonate cannot be prepared by Solvay process. Why?

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  7. Li2CO3 decomposes at a lower temperature whereas Na2CO3 at higher temp...

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  8. Starting with NaCl how would you proceed to prepare Na metal

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  9. Starting with NaCl how would you proceed to prepare Na metal

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  10. Starting with NaCl how would you proceed to prepare Na2O2

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  11. Starting with NaCl how would you proceed to prepare Na2CO3?

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  12. A piece of magnesium is burned in air. What do you observe ?

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  13. What happenes when quick lime is heated with silica

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  14. What happens when slaked lime is treated with dry chlorine?

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  15. What happenes when calcium nitrate is heated?

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  16. Draw the structure of Becl2(vapour)

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  17. Alkali metals and alkaline earth metals belong to the s-block of the p...

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  18. The hydroxides and carbonates of Na and K are solube in the water whil...

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  19. Why are lithium salts commonly hydrated and those of other alkail meta...

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  20. Why is LiF almost insoluble in the water while LiCl is soluble not onl...

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