Home
Class 12
CHEMISTRY
State reasons for the following: (i) C...

State reasons for the following:
(i) `Cu(I)` ion is not stable in an aqueous solution.
(ii) Unlike `Cr^(3+)Mn^(2+), Fe^(3+)` and the subsequent other M2+ ions of the 3d series of elements, the 4d and the 5d series metals generally do not form stable cationic species. 

Text Solution

Verified by Experts

(ii) Due to lanthanoid contraction the expected increase in size does not occur.
Promotional Banner

Topper's Solved these Questions

  • D - BLOCK ELEMENTS F - BLOCK ELEMENTS

    OSWAAL PUBLICATION|Exercise TOPIC-1 (D - BLOCK ELEMENTS, THEIR PROPERTIES AND COMPONDS) LONG ANSWER TYPE QUESTIONS - I|20 Videos

  • D - BLOCK ELEMENTS F - BLOCK ELEMENTS

    OSWAAL PUBLICATION|Exercise TOPIC-1 (D - BLOCK ELEMENTS, THEIR PROPERTIES AND COMPONDS)LONG ANSWER TYPE QUESTIONS - II|12 Videos

  • D - BLOCK ELEMENTS F - BLOCK ELEMENTS

    OSWAAL PUBLICATION|Exercise TOPIC - 2 (F - BLOCK ELEMENT , LANTHANOIDS AND ACTINOIDS)(LONG ANSWER TYPES QUESTIONS)|6 Videos

  • CO-ORDINATION COMPOUNDS

    OSWAAL PUBLICATION|Exercise TOPIC-2 (WERNER.S THEORY BONDING IN CO-ORDINATION COMPOUND , VBT, CFT AND IMPORTANCE OF CO-ORDINATION COMPOUNDS) (Very Answer Type Questions)|19 Videos

  • ELECTRO-CHEMISTRY

    OSWAAL PUBLICATION|Exercise Topic - 3 ELECTROLYSIS , LAWS OF ELECTROLYSIS, BATTERIES, FUEL CELLS AND CORROSION (LONG ANSWER TYPE QUESTIONS)|4 Videos

Similar Questions

Explore conceptually related problems

Account for the following: (i) Cu^(+) ions are not stable in aqueous solution. (ii) Most of the transition metal ions exhibit paramagnetic behaviour.

Which of the following ions is coloured iņ aqueous solution? i) Sc^(3+) ii) Co^(2+) iii) Cu^(+)

Name one 3d series element that do not show variable oxidation state.

(a) Give reasons for the following observations: (i) Cu^(+) ion is not stable in aqueous solution. (ii) Mn (II) ion shows maximum paramagnetic character amongst the bivalent ions of first transition series. (iii) Scandium (At. no. 21) salts are white. (b) Describe the reactions involved in the preparation of K_2Cr_2O_7 from chromite ore.

Predict which of the following will be coloured in aqueous solution ? Ti^(3+), V^(3+), Cu^(+), Sc^(3+), Mn^(2+), Fe^(3+) and Co^(2+) . Give reasons for each.

Assign reasons for each of the following: (i) Transition metals generally form coloured compounds. (ii) Manganese exhibits the highest oxidation state of +7 among the 3d-series of transition elements.

Name the elements in the 3d-series that shows (i) maximum oxidation state (ii) is diamagnetic

How would you account for the following: (i) Cr^(2+) is reducing in nature while with the same d-orbital configuration (d^4) Mn^(3+) is an oxidising agent. (ii) In a transition series of metals, the metal which exhibits the greatest number of oxidation state occurs in the middle of the series.

Give reason: Mn exhibits the higher oxidatoin state of +7 among 3d series transition elements.

Give reasons: Zn has highest value for E^@(M^3+/M^2+) among 3d series elements.

OSWAAL PUBLICATION-D - BLOCK ELEMENTS F - BLOCK ELEMENTS -TOPIC-1 (D - BLOCK ELEMENTS, THEIR PROPERTIES AND COMPONDS)(SHORT ANSWER TYPE QUESTIONS - I)
  1. Explain briefly how +2 state becomes more and more stable in the first...

    Text Solution

    |

  2. Name be oxo-metal anions of the first series of the transition metals ...

    Text Solution

    |

  3. What are the characteristics of the transition elements and why are th...

    Text Solution

    |

  4. In what way is the electronic configuration of transition elements dif...

    Text Solution

    |

  5. How is potassium permanganate ( KMnO4) prepared from MnO2 ? write the ...

    Text Solution

    |

  6. Write the structure of MnO4^(2-) and MnO(4)^(-) ions.

    Text Solution

    |

  7. Explain why: (i) E^0 for Mn^(3+)//Mn^(2+) couple is more positive th...

    Text Solution

    |

  8. Complete the following chemical equations: (i) MnO(4)^(-) (aq) + S2O...

    Text Solution

    |

  9. Assign reasons for the following: (i) Copper (I) ion is not known in...

    Text Solution

    |

  10. Assign reasons for each of the following: (i) Transition metals gene...

    Text Solution

    |

  11. How would you account for the following: (i) Cr^(2+) is reducing in ...

    Text Solution

    |

  12. State reasons for the following: (i) Cu(I) ion is not stable in an a...

    Text Solution

    |

  13. Explain giving reasons : (i) Transition metals and their compounds g...

    Text Solution

    |

  14. Account for the following: (i) Cu^(+) ions are not stable in aqueous s...

    Text Solution

    |

  15. How would you account for the following: (i) The atomic radii of the...

    Text Solution

    |

  16. Name the reaction that takes place when a mixture of potassium dichrom...

    Text Solution

    |

  17. Account for the following: (i) In the series Sc to Zn, the enthalpy ...

    Text Solution

    |

  18. Account for the following: (i) Transition elements exhibit higher en...

    Text Solution

    |

  19. Explain the following observations: (i) Generally, there is an incr...

    Text Solution

    |

  20. Explain the following observations: (i) Transition elements generall...

    Text Solution

    |