Home
Class 12
CHEMISTRY
The lanthanide contraction is responsibl...

The lanthanide contraction is responsible for the fact that
(a)Zr and Yt have about the same radius
(b)Zr and Nb have smaller oxidation state
(c)Zr and Hf have about the same radius
(d)Zr and Zn have the same oxidation state.

A

Zr and Y have about the same radius

B

Zr and Nb have similar oxidation state

C

Zr and Hf have about the same radius

D

Zr and Zn have the same oxidation state

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ALCOHOLS, PHENOLS AND ETHERS

    AAKASH INSTITUTE ENGLISH|Exercise Try yourself|5 Videos

  • ALCOHOLS, PHENOLS AND ETHERS

    AAKASH INSTITUTE ENGLISH|Exercise Exercise|40 Videos

  • ALCOHOLS, PHENOLS AND ETHERS

    AAKASH INSTITUTE ENGLISH|Exercise Try Yourself|5 Videos

Similar Questions

Explore conceptually related problems

A sphere, a cylinder and a cone have the same radius and same height. Find the ratio of their volumes.

Which of the following pair of elements have same atomic radius

Should the speed of two artificial satellites of the earth having the different masses but the same orbital radius be the same?

An electric field is defined in terms of q_(0) a small positive charge. If the definition was in terms of a small negative charge of the same magnitude, then compared to the original field the newly defined electric field. (a) would point in the same direction and have the same magnitude. (b) would point in the opposite direction and have the same magnitude. (c ) would point in the same direction and have the different magnitude. (d) would point in the opposite direction and have the different magnitude.

How would you account for the following? (l) Transition metals exhibit variable oxidation states. (ii) Zr (Z = 40) and Hf (Z = 72) have almost identical radii.

Oxidation number is the charge which an atom of an element has in its ion or appears to have when present in the combined state. It is also called oxidation state. Oxidation number of any atom in the elementary state is zero. Oxidation number of a monoatomic ion is equal to the charge on it. In compounds of metals with non metals, metals have positive oxidation number while non metals have negative oxidation numbers. In compounds of two difference elements, the more electronegative element has negative oxidation number whereas the other has positive oxidation number. In complex ions, the sum of the oxidation number of all the atoms is equal to the charge on the ion. If a compound contains two or more atoms of the same element, they may have same or different oxidation states according as their chemical bonding is same or different. The oxidation state of the most electronegative element in the products of the reaction between BaO_(2) and H_(2)SO_(4) are

Complete and balance the followig equations in basic solution : Hg_2(CN)_2+Ce^(4+)toCO_3^(2-)+NO_3^(ɵ)+Hg(OH)_2+Ce^(3+) (a) By considering C in +4 oxidation state and N in +5 oxidation state. (b) By considering C in +4 oxidation state and N in +5 oxidation state (c) By considering Hg in +2 and C in +4 oxidation state. (d) Explain why the same result is obtained regardless of the choice of oxidation state.

Explain the following (a) Zr and Hf exhibit similar properties. (b) Most of the transition elements show large number of oxidation states.

Zr(Z=40) and Hf(Z=72) have similar atomic and ionic radii because of:

If a solid and a hollow conducting sphere have same radius then

AAKASH INSTITUTE ENGLISH- ALCOHOLS, PHENOLS AND ETHERS-Assignment Section -D (Assertion - reason type question)
  1. The lanthanide contraction is responsible for the fact that (a)Zr and...

    Text Solution

    |

  2. Assertion : Boiling point of p-nitrophenol is greater than that of o-n...

    Text Solution

    |

  3. A : When C(2) H(5) - O- CH(3) is reacted with one mole of Hl then C(2...

    Text Solution

    |

  4. A : When 3,3-dimethyl butan - 2 - ol is heated in presence of concentr...

    Text Solution

    |

  5. A : In esterification reaction , HCOOH is the most reactive acid among...

    Text Solution

    |

  6. A : Ethers can't be distilled upto dryness due to fear of explosion . ...

    Text Solution

    |

  7. Phenol is less acidic than........... .

    Text Solution

    |

  8. A : CH(3) - underset(O)underset(||)(C)-COOH gives haloform reaction ...

    Text Solution

    |

  9. A : Diphenyl ether is prepared by Williamson synthesis . R : This...

    Text Solution

    |

  10. A : Grignard's reagent is prepared in the presence of ether . R :...

    Text Solution

    |

  11. A : CH(3) - underset(CH(3))underset(|)overset(CH(3))overset(|)(C)-CH=...

    Text Solution

    |

  12. A : Two moles of Grignard reagent is consumed in the formation of ter...

    Text Solution

    |

  13. A : bond angle in ether is slightly greater than normal tetrahedral an...

    Text Solution

    |

  14. A : CH(3)-underset(CH(3))underset(|)overset(CH(3))overset(|)(C)-O-CH...

    Text Solution

    |

  15. A : Ortho - cresol is weaker acidic than meta-cresol . R : It is d...

    Text Solution

    |

  16. A : Among all ortho halophenol , fluorophenol is least acidic . R ...

    Text Solution

    |

  17. A : In esterification reaction alcohol act as nucleophile . R : ...

    Text Solution

    |

  18. A : Phenol is manufactured by Dow 's pocess. R : It involves the ...

    Text Solution

    |

  19. A : Primary alcohol is prepared by the reaction of primary amine with ...

    Text Solution

    |

  20. A : The reactivity order of alcohols is 1^(@) gt 2^(@) gt 3^(@) for ...

    Text Solution

    |

  21. A : The dehydration of ethyl alcohol in presence of Al(2)O(3) at 633 ...

    Text Solution

    |