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What makes caesium and potassium useful ...

What makes caesium and potassium useful as electrodes in photoelectric cells?

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NCERT TELUGU-THE s-BLOCK ELEMENTS-EXERCISES
  1. In what ways lithium shows similarities to magnesium in its chemical b...

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

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  3. What makes caesium and potassium useful as electrodes in photoelectric...

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

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  7. Potassium carbonate cannot be prepared by Solvey process. Why?

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  8. Why is Li2CO3 decomposed at a lower temperature whereas Na2CO3 at hig...

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  9. Compare the solubility and thermal stability of the following compound...

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  10. Starting with sodium chloride how would you proceed to prepare (1) S...

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  11. What happens when (i) magnesium is burnt in air (ii) quick lime is hea...

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  12. Describe two important uses of each of the following : (i) caustic sod...

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  13. Draw the structure of (i) BeCl(2) (vapour) and (ii) BeCl(2) (solid).

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

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  15. Describe the importance of the following : (i) limestone (ii) cement (...

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  16. Lithium salts are mostly hydrated . Why ?

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

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  18. Explain the significance of sodium , potassium, magnesium and calcium ...

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  19. Comment on each of the following observations: (a) The mobilities of...

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  20. Comment on each of the following observations: (a) The mobilities of...

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