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Discuss why potassium and caesium are us...

Discuss why potassium and caesium are used in photoelectric cells.

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Potassium and cesium have much lower ionization enthalpy than that of lithium. As a result, these metals on exposure to light, easily emit electrons but lithium does not. Therefore, K and Cs rather than Li are used in photoelectric cells.
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PATHFINDER-S-BLOCK ELEMENTS AND THEIR COMPOUNDS, HYDROGEN AND ITS COMPOUNDS-QUESTION BANK
  1. Compare the alkali metals and alkaline earth metals with respect to ...

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  2. Explain why can alkali and alkaline earth metals not be obtained by ch...

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  3. Discuss why potassium and caesium are used in photoelectric cells.

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  4. The E^(0) for Cl2//Cl^(-)"is"+1.36" for"l2//l^(-)"is"+0.53" for"Ag^+//...

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

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

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  7. Discuss the various reactions that occur in the Solvay process.

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  8. Comment on the reactions of dihydrogen with chlorine,

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  9. Comment on the reactions of dihydrogen with sodium.

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  10. Comment on the reactions of dihydrogen with copper(II)oxide

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  11. Would you expect the hydrides of N, O and F to have lower boiling poin...

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  12. Can phosphorus with outer electronic configuration 3S^2 4p^3 form PH5 ...

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  13. How many hydrogen-bonded water molecule(s) are associated in CuSo4. 5H...

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  14. Calculate the strength of 10 volume solution of hydrogen peroxide.

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  15. The metallic lustre exhibited by sodium is explained by

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  16. Alkali metals impart colour to Bunsen flame due to

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  17. On prolonged exposure to air, sodium finally changes to

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  18. Which reaction below is explosive?

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  19. Which hydroxide is most basic?

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  20. Which of the following alkali metal halides has the lowest lattice ene...

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