Home
Class 12
CHEMISTRY
Reason of lanthanoid contraction is...

Reason of lanthanoid contraction is

A

negligible screening effect of 'f' -orbitals

B

increasing nuclear charge

C

decreasing nuclear charge

D

decreasing screening effect

Text Solution

Verified by Experts

Due to poor screening or shielding effect of 4f-orbitals, nucleus will exact a stronger attraction and size ofatom or ion goes on decreasingas we move in the series with increase in atomic number.
Promotional Banner

Topper's Solved these Questions

  • D- AND F-BLOCK ELEMENTS

    PRADEEP|Exercise COMPREHENSION 1|6 Videos

  • D- AND F-BLOCK ELEMENTS

    PRADEEP|Exercise COMPREHENSION 2|6 Videos

  • D- AND F-BLOCK ELEMENTS

    PRADEEP|Exercise VALUE BASED QUESTIONS|2 Videos

  • CORDINATION COMPOUNDS

    PRADEEP|Exercise Important Questions|28 Videos

  • ELECTROCHEMISTRY

    PRADEEP|Exercise IMPORTANT QUESTIONS FOR BOARD EXAMINATION|25 Videos

Similar Questions

Explore conceptually related problems

Reason of lanthanide contraction is

(a) What is the cause of lanthanoid contraction? Discuss. (b) What is Misch metal?

Lanthanoide contraction is due to

Assertion : 4d and 5d series elements have nearly same atomic radius. Reason : Lanthanoid contraction.

The effect of lanthanoid contraction in the lanthanoid series of elements by and large means :

PRADEEP-D- AND F-BLOCK ELEMENTS-COMPETITIONS FOCUS
  1. The actinoids exhibit more number of oxidation states in general than ...

    Text Solution

    |

  2. The reason for greater range of oxidation state in actinoids is attrib...

    Text Solution

    |

  3. Reason of lanthanoid contraction is

    Text Solution

    |

  4. Which one of the following statements related to lanthanons is incorre...

    Text Solution

    |

  5. All Cu(II) halides are known except the iodide. The reason for it is t...

    Text Solution

    |

  6. In nitroprusside ion, the iron and NO exist as Fe(II) and NO^(+) rathe...

    Text Solution

    |

  7. A red solid is insoluble in water. However, it becomes soluble if some...

    Text Solution

    |

  8. [Fe(H(2)O)(5)NO]^(2+) is a complex formed during the brown ring test f...

    Text Solution

    |

  9. WhenHg(2)Cl(2) ionizes, the ins produced and the unpaired electrons pr...

    Text Solution

    |

  10. Prussian blue is -

    Text Solution

    |

  11. Which one of the following reactions involves disproportionation ?

    Text Solution

    |

  12. Pick out the correct statements from the following 1. Cobalt (III) ...

    Text Solution

    |

  13. Which out of the following belong to 3d-series?

    Text Solution

    |

  14. Transition elements have greater tendency to form complexes because

    Text Solution

    |

  15. The colour of the transition metal ions is due to

    Text Solution

    |

  16. Which of the following show oxidation state of +4 ?

    Text Solution

    |

  17. Potassium manganate (K(2)MnO(4)) is formed when:

    Text Solution

    |

  18. Which of the following statement(s) is (are) correct with reference to...

    Text Solution

    |

  19. Which of the following statement(s) is/are correct when a mixture of N...

    Text Solution

    |

  20. Reduction of the metal centre in aqueous permanganate ion involves

    Text Solution

    |