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Why are potassium and caesium rather tha...

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

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

Li is used in photoelectric cells.

Alkali metals used in photoelectric cells

The metal used in photoelectric cell is-

Statement-1: Potassium and caesium are used in photo-electric cells. Statement-2: Potassium and caesium emit electrons on exposure to light above certain minimum frequency.

Why caesium and potassium are used as electrodes in photoelectric cells ?

Give reasons for the following: a. Alkli metals do not occur free in nature. b. Alkali metal salts impart characteristic colour to the flame. c. Caesium is used in photoelectric cell. d. Alkali metals are good reducing agents in aqueous medium.

Why cesium can be used in photoelectric cell, while lithium cannot be ?

Why is lithium iodide more covalent than lithium fluoride ?

Potassium ferrocyanide is used in the detection of

ICSE-THE s - BLOCK ELEMENTS-NCERT TEXT-BOOK. EXERCISES (WITH HINTS AND SOLUTIONS)
  1. Why are potassium and caesium rather than lithium used in photoelectri...

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  2. What are the common physical and chemical features of alkali metals?

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  3. Discuss the general characteristics and gradation in properties of alk...

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  4. Why are alkali metals not found in nature ?

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  5. Find out the oxidation state of sodium in Na(2)O(2)

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  6. Explain, why is sodium less reactive than potassium ?

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  7. Compare the alkali metals and alkaline earth metals with respect to ...

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  8. Compare the alkali metals and alkaline earth metals with respect to ...

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  9. Compare the alkali metals and alkaline earth metals with respect to so...

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  10. In what ways lithium shows similarities to magnesium in its chemical b...

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

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

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

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

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

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

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  17. Why is Li(2)CO(3) decomposed at a lower temperature whereas Na(2)CO(3)...

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

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  19. Starting with sodium chloride how would you proceed to prepare (i) sod...

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  20. Starting with sodium chloride how would you proceed to prepare (i) sod...

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  21. Starting with sodium chloride how would you proceed to prepare (i) sod...

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