Home
Class 12
CHEMISTRY
The alkali metals dissolve in liquid NH(...

The alkali metals dissolve in liquid `NH_(3)`, it is found that:

A

The dilute solution are blue but the colour changes to brone with increasing concentration

B

The blue colour is due to presence of solvated electrons

C

The blue solutions are paramagnetic but the bronze coloured solutions are diamagnectic

D

All the facts given above are found

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • s-BLOCK ELEMENTS

    VK JAISWAL ENGLISH|Exercise Level 3|49 Videos

  • s-BLOCK ELEMENTS

    VK JAISWAL ENGLISH|Exercise ONE OR MORE ANSWER IS/ARE CORRECT|66 Videos

  • s-BLOCK ELEMENTS

    VK JAISWAL ENGLISH|Exercise SUBJECTIVE PROBLEMS|2 Videos

  • QUALITATIVE INORGANIC ANALYSIS

    VK JAISWAL ENGLISH|Exercise SUBJECTIVE PROBLEMS|4 Videos

  • TYPES OF REACTIONS

    VK JAISWAL ENGLISH|Exercise SUBJECTIVE PROBLEMS|42 Videos

Similar Questions

Explore conceptually related problems

Alkali metals show-

Alkali metals dissolve in liquid NH_(3) then which of the following observations is not true:

When alkali metal is dissolved in liquid NH_3 the blue colour of the dilute solution changes to bronze colour due to

Give reason for the following: a. Why potassium is less reactive than rubidium ? b. Irrespective of the alkali metal dissolved in liquid ammonia, dil solution is always blue coloured.

Alkali metals act as

Alkali metals salts are

When an alkali metal dissolves in liquid ammonia the solution can acquire different colours. Explain the reasons for this type of colour change.

Alkali metals contain

Alkali metals oxide are obtained by combustion of the metals.Although Na normally gives Na_2O_2 ,it will take up further oxygen at elevated pressure and temperature to form NaO_2 .The per and superoxides of the heavier alkalies can also be prepared by passing stoichiometric amounts of oxygen into their solution in liquid ammonia. The different alkali metal oxides can be distinguished by reaction with water.The superoxides reacts with CO_2 and give oxygen gas.The stability of per and superoxides is based upon that larger cation can stablise larger anion, due to larger lattice energy. Alkali metals dissolve in liquid ammonia.Dilute solutions are dark blue in colour but as the concentration increases above 3M, the colour changes to copper bronze and the solution acquires the metallic lusture due to the formation of metal ions clusters.The solutions of alkali metals in liquid ammonia are good conductors of electricity due to the presence of ammoniated cations and ammoniated electrons.However, the conductivity decreases as the concentrations increases, since ammoniated electrons and ammoniated cation associate. On dissolving smaller (less than 3M) amount of sodium metal in liquid ammonia at low temperature , which one of the following does not occur ?

Alkali metals oxide are obtained by combustion of the metals.Although Na normally gives Na_2O_2 ,it will take up further oxygen at elevated pressure and temperature to form NaO_2 .The per and superoxides of the heavier alkalies can also be prepared by passing stoichiometric amounts of oxygen into their solution in liquid ammonia. The different alkali metal oxides can be distinguished by reaction with water.The superoxides reacts with CO_2 and give oxygen gas.The stability of per and superoxides is based upon that larger cation can stablise larger anion, due to larger lattice energy. Alkali metals dissolve in liquid ammonia.Dilute solutions are dark blue in colour but as the concentration increases above 3M, the colour changes to copper bronze and the solution acquires the metallic lusture due to the formation of metal ions clusters.The solutions of alkali metals in liquid ammonia are good conductors of electricity due to the presence of ammoniated cations and ammoniated electrons.However, the conductivity decreases as the concentrations increases, since ammoniated electrons and ammoniated cation associate. Solution of sodium metals in liquid ammonia is strongly reducing due to the presence of :

VK JAISWAL ENGLISH-s-BLOCK ELEMENTS-Level 2
  1. Melting point of mixture of Na(2)CO(3)+K(2)CO(3) is :

    Text Solution

    |

  2. Select incorrect statement:

    Text Solution

    |

  3. The alkali metals dissolve in liquid NH(3), it is found that:

    Text Solution

    |

  4. Among the nitrate of alkali metals which one can be decomposed to its ...

    Text Solution

    |

  5. When a standard solution of NaOH is left in air for a few hours:

    Text Solution

    |

  6. The addition of Na(2)CO(3), to the aqueous solution of an oxide produc...

    Text Solution

    |

  7. Salt A+SrarrBoverset(BaCl(2))rarr White precipitate A is paramagnetic ...

    Text Solution

    |

  8. Baking powder used to make cake is a mixture of starch, NaHCO(3) and ...

    Text Solution

    |

  9. To an acidified dichromate solution,, a pinch of Na(2)O(2) is added an...

    Text Solution

    |

  10. Which of the following compounds is consumed during the preparation of...

    Text Solution

    |

  11. Which of the following statement is incorrect?

    Text Solution

    |

  12. Nitrogen dioxide cannot be obtained from:

    Text Solution

    |

  13. 'A'+H(2)O to NaOH: 'A'overset(O(2))underset(400^(@)C)(to)Boverset(H(2)...

    Text Solution

    |

  14. CaCl(2) is preferred over NaCl for clearing ice on roads particularly ...

    Text Solution

    |

  15. A metal which does not react with nitrogen is :

    Text Solution

    |

  16. Which metal bicarbonates does not exist in solid state? (i)LiHCO(3) ...

    Text Solution

    |

  17. The incorrect order of solubility in water is:

    Text Solution

    |

  18. Which metal bicarbonates does not exist in solid state? (i)LiHCO(3) ...

    Text Solution

    |

  19. Which one of the following order is correct ?

    Text Solution

    |

  20. Metal M+"air" overset(delta)(to)Aoverset(H(2)O)(to)Boverset(HCl)(to) W...

    Text Solution

    |