Home
Class 12
CHEMISTRY
Why first ionisation enthalpy of Cr is l...

Why first ionisation enthalpy of Cr is lower than that of Zn?

Text Solution

Verified by Experts

The ionisation enthalpy of `Cr ([Ar] 3d^(5) 4s^1)` is lower because it can easily lose electron to form stable electronic configuration. But `Zn([Ar] 3d^(10)4s^2)` does not form stable` ([Ar]3d^(10)4s^1)` configuration after losing one electron from 4s orbital.
Promotional Banner

Topper's Solved these Questions

  • D AND F-BLOCK ELEMENTS

    MODERN PUBLICATION|Exercise NCERT FILE (EXEMPLAR PROBLEM (MATCHING TYPE QUESTION))|7 Videos

  • D AND F-BLOCK ELEMENTS

    MODERN PUBLICATION|Exercise NCERT FILE (EXEMPLAR PROBLEM (ASSERTION AND REASON TYPE QUESTION))|5 Videos

  • D AND F-BLOCK ELEMENTS

    MODERN PUBLICATION|Exercise NCERT FILE (EXEMPLAR PROBLEM (MULTIPLE CHOICE QUESTION TYPE -II))|10 Videos

  • CHEMISTRY IN EVERYDAY LIFE

    MODERN PUBLICATION|Exercise UNIT PRACTICE TEST|13 Videos

  • ELECTROCHEMISTRY

    MODERN PUBLICATION|Exercise UNIT PRACTICE TEST|20 Videos

Similar Questions

Explore conceptually related problems

Why is first ionisation enthalpy of Cr lower than that of Zn?

The first ionization enthalpy of O is lower than that of N.

How would you explain the fact that the first ionisation enthalpy of sodium is lower than that of magnesium but its second ionisation enthalpy is higher than that of magnesium?

Assertion: The first ionisation enthalpy of aluminium is lower than that of magnesium. Reason : Ionic radius of aluminium is smaller than that of magnesium.

The first ionisation energy of silicon is lower than that of

MODERN PUBLICATION-D AND F-BLOCK ELEMENTS-NCERT FILE (EXEMPLAR PROBLEM (SHORT TYPE QUESTION))
  1. Why does copper not replace hydrogen from acids?

    Text Solution

    |

  2. Why E^(-) values for Mn, Ni and Zn are more negative than expected?

    Text Solution

    |

  3. Why first ionisation enthalpy of Cr is lower than that of Zn?

    Text Solution

    |

  4. Transition elements show high melting points. Why?

    Text Solution

    |

  5. When Cu^(2+) ion is treated with KI, a white precipitate is formed. Ex...

    Text Solution

    |

  6. Out of Cu(2)Cl(2) and CuCl(2), which is more stable and why?

    Text Solution

    |

  7. When a brown compound of manganese (A) is treated with HCl it gives a ...

    Text Solution

    |

  8. Although fluorine is more electronegative than oxygen, but the ability...

    Text Solution

    |

  9. Although Cr^(3+) and Co^(2+) ions have same number of unpaired electro...

    Text Solution

    |

  10. Ionisation enthalpies of Ce, Pr and Nd are higher than Th, Pa and U. W...

    Text Solution

    |

  11. Although Zr belongs to 4d and Hf belongs to 5d transition series but i...

    Text Solution

    |

  12. Although +3 oxidation stae is thje characteristic oxidation state of ...

    Text Solution

    |

  13. Explain why does colour of KMnO(4) disappear when oxalic acid is added...

    Text Solution

    |

  14. When orange solution containing Cr(2)O(7)^(2-) ion is treated with an ...

    Text Solution

    |

  15. A solution of KMnO(4) on reduction yields either a colourless solution...

    Text Solution

    |

  16. The second and third rows of transition elements resemble each other m...

    Text Solution

    |

  17. E^(Theta) of Cu is +0.34V while that of Zn is -0.76 V. Explain.

    Text Solution

    |

  18. The halides of transition elements become more covalent with increasin...

    Text Solution

    |

  19. While filling up of electrons in the atomic orbitals, the 4s-orbital i...

    Text Solution

    |

  20. Reactivity of transition element decreases almost regularly from Sc t...

    Text Solution

    |