Home
Class 12
CHEMISTRY
Assign reasons for the following: What...

Assign reasons for the following:
What is lanthanoid contraction ? Explain its any one consequence.

Text Solution

Verified by Experts

Regular decrease of atomic and ionic radii with increase in atomic number in case of lanthanoids is called lanthanoid contraction.
Promotional Banner

Topper's Solved these Questions

  • d- AND- f- BLOCK ELEMENTS

    ICSE|Exercise EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(SHORT ANSWER QUESTIONS)|50 Videos

  • d- AND- f- BLOCK ELEMENTS

    ICSE|Exercise EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(LONG ANSWER QUESTIONS)|51 Videos

  • d- AND- f- BLOCK ELEMENTS

    ICSE|Exercise EXERCISE (PART-I)(MATCH AND FOLLOWINGS):|1 Videos

  • COORDINATION COMPOUNDS

    ICSE|Exercise ISC EXAMINATION QUESTION (PART- II DESCRIPTIVE QUESTIONS)|39 Videos

  • DISTINCTION BETWEEN PAIRS OF COMPOUNDS

    ICSE|Exercise QUESTIONS |155 Videos

Similar Questions

Explore conceptually related problems

Reason of lanthanoid contraction is

What is meant by 'lanthanoid contraction'?

Assign reasons for the following: Why is the chemistry of all lanthanoids indential ?

Which of the following facts are not explainable by lanthanoid contraction

Assign reasons for the following : (i) The enthalpies of atomisation of transition elements are high. (ii) The transition metals and many of their compounds act as good catalyst. (iii) From element to element the actinoid contraction is greater than the lanthanoid contraction. (iv) The E^(@) value for the Mn^(3+)//Mn^(2+) couple is much more positive than that for Cr^(3+)//Cr^(2+) . (v) Scandium (Z = 21) does not exhibit variable oxidation states and yet it is regarded as transition element.

Which of the following is not a consequence of the Lanthanoid contraction?

Which of the following is not a consequence of the Lanthanoid contraction?

Assign reasons for the following : (a) Co^(2+) has higher magnetic moment than Ni^(2+)

Assign reason for the following: In solid state, PCI_5 , behaves as an ionic species.

Assign reasons for the following : (i) lonic bond is non-following: (ii) lonic bond is non-directional (iii) lonic compounds have high melting points.

ICSE-d- AND- f- BLOCK ELEMENTS-EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(VERY SHORT ANSWER QUESTIONS)
  1. Why is copper-29 considered a transition metal?

    Text Solution

    |

  2. Why do Zr and Hf exhibit similar properties?

    Text Solution

    |

  3. Assign reasons for the following: What is lanthanoid contraction ? E...

    Text Solution

    |

  4. What is the difference between the electronic configuration of lanthan...

    Text Solution

    |

  5. Which is the most common oxidation state of lanthanoids?

    Text Solution

    |

  6. Why does a transition series contains 10 elements?

    Text Solution

    |

  7. Write the formula of a compound where transition metal is in +7 oxidat...

    Text Solution

    |

  8. Which divalent metal ion has maximum paramagnetic character among the ...

    Text Solution

    |

  9. Write the atomic number of the element in which the filling of 3d-subs...

    Text Solution

    |

  10. In the transition series, with an increase in atomic number, the atomi...

    Text Solution

    |

  11. Name a lanthanoid element which exhibits +4 oxidation state besides +3...

    Text Solution

    |

  12. What is the effect of increasing pH on K2Cr2O7 solution?

    Text Solution

    |

  13. Which is more basic La(OH)(3)zor Lu(OH)3 ? Why?

    Text Solution

    |

  14. What is the basic difference between the electronic configurations of ...

    Text Solution

    |

  15. Why do transition elements show similarities along the horizontal peri...

    Text Solution

    |

  16. Why the third ionization energy of manganese (atomic number 25) unexpe...

    Text Solution

    |

  17. Which property of the transition elements makes them good catalysts?

    Text Solution

    |

  18. What are coinage metals ?

    Text Solution

    |

  19. Write the ionic reaction for the reaction between MnO4^(-) ions and ox...

    Text Solution

    |

  20. Write one reaction using alkaline KmnO4.

    Text Solution

    |