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The blue colour of solution of ammonia a...

The blue colour of solution of ammonia and alkali metals is due to which species?

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The blue colour of the solution is due to ammoniated electron.
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All alkali metals dissolve in anhydrous liquid ammonia to give blue colour solution. It is the ammoniated electron which is reponsible for the blue colour of the solution, and the electrical conductivity is due to the ammoniated cation, [M(NH_(3))_(x)]^(+) as well as the ammoniated electron, [e(NH_(3))_(y)]^(-) , value of x and y depend on the extent of solvation by NH_(3) . Dilute solutions are paramagnetic due to free ammoniated electrons. Q. Which of the following statement about solution of alkali metals in liquid ammonia is correct?

AAKASH INSTITUTE-THE S-BLOCK ELEMENTS-Try Yourself
  1. If standard electrode potential of an element x is -1.70V and of anoth...

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  2. Name the ions present in solution of ammonia and alkali metals.

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  3. The blue colour of solution of ammonia and alkali metals is due to whi...

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  4. The blue coloured solution is diamagnetic or paramagnetic?

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  5. The bronze coloured solution is diamagnetic or paramagnetic?

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  6. What kind of oxides are formed by sodium?

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  7. What is the trend of enthalpy of formation of alkali metal fluoride?

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  8. The melting and boiling points of alkali metal halides always follow t...

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  9. Write two properties of alkali metals salts of oxo-acids.

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  10. Why lithium carbonate is not stable to heat?

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  11. Write one difference between lithium and other members of alkali metal...

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  12. Write one similarity between lithium and magnesium.

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  13. How many water of crystallization are there in washing soda?

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  14. While purification of NaCl, why only crystal of pure NaCl separate out...

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  15. Which compound of sodium is formed when sodium hydroxide absorbs CO(2)...

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  16. Write two uses of sodium hydroxide.

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  17. Why first ionization energy of alkaline earth metals is higher than th...

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  18. Write the trend of hydration enthalpies of alkaline earth metal ions.

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  19. Why Beryllium and magnesium do not impart colour to the flame?

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  20. What is the nature of Be(OH)(2)?

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