Home
Class 12
CHEMISTRY
The (n-1)d shell of electron in d-block ...

The (n-1)d shell of electron in d-block elements is expanding and, therefore they have many physical and chemical properties in common. They show variable oxidation state and all are metals. The transition element i.e., d-block element show an unparallel tendency to form coordination compound with thhose groups which are able to donate an electron pair (i.e. lewis base).
Which one is most acidic?

A

`Cr_(2)O_(3)`

B

`V_(2)O_(5)`

C

`Mn_(2)O_(7)`

D

`Fe_(2)O_(5)`

Text Solution

Verified by Experts

The correct Answer is:
C
As the oxidation state of metal associated with oxygen increases, the acidic character of oxide incease. So `Mn_(2)O_(7)` is most acidic as it has higest, `+7`, oxidation state.
Promotional Banner

Topper's Solved these Questions

  • D BLOCK & TRANSITION ELEMENTS

    NARAYNA|Exercise Level-V (H.W)|47 Videos

  • D - BLOCK ELEMENTS

    NARAYNA|Exercise CHECK YOUR GRASP|7 Videos

  • ELECTRO CHEMISTRY

    NARAYNA|Exercise EXERCISE - IV|44 Videos

Similar Questions

Explore conceptually related problems

The (n-1)d shell of electron in d-block elements is expanding and, therefore they have many physical and chemical properties in common. They show variable oxidation state and all are metals. The transition element i.e., d-block element show an unparallel tendency to form coordination compound with thhose groups which are able to donate an electron pair (i.e. lewis base). Which of the following statement is incorrect?

(a) Define transition elements. (b) Give general electronic configuration of f-block elements.(c ) Most of transition elements are coloured, why? (d ) Transition elements show variable oxidation states, why?

The transition element ( with few exceptions ) show a large number of oxidation states . The various oxidation states are related to the electronic configuration of their atoms. The variable oxidation states of a transition metal is due to the involvement of (n-1)d and outer ns electrons . For the first five elements of 3d transition series , the minimum oxidation state is equal to the number of electrons in 4s shell and the maximum oxidation state is equal to the sum of 4s and 3d electrons. The relative stability of various oxidation states of a given element can be explained on the basis of stability of d^(0),d^(5) and d^(10) configuration . In which of the following pairs , the first species is more stable than second one

The transition element ( with few exceptions ) show a large number of oxidation states . The various oxidation states are related to the electronic configuration of their atoms. The variable oxidation states of a transition metal is due to the involvement of (n-1)d and outer ns electrons . For the first five elements of 3d transition series , the minimum oxidation state is equal to the number of electrons in 4s shell and the maximum oxidation state is equal to the sum of 4s and 3d electrons. The relative stability of various oxidation states of a given element can be explained on the basis of stability of d^(0),d^(5) and d^(10) configuration . In 3d series, the maximum oxidation state is shown by

The transition element ( with few exceptions ) show a large number of oxidation states . The various oxidation states are related to the electronic configuration of their atoms. The variable oxidation states of a transition metal is due to the involvement of (n-1)d and outer ns electrons . For the first five elements of 3d transition series , the minimum oxidation state is equal to the number of electrons in 4s shell and the maximum oxidation state is equal to the sum of 4s and 3d electrons. The relative stability of various oxidation states of a given element can be explained on the basis of stability of d^(0),d^(5) and d^(10) configuration . Identify the correct statement

Due to availability of vacant orbitals of sufficiently low energy, d-block elements form complexes, d-block elements have different properties such as-catalytic, magnetic, alloy formation, interistitial compounds formation. Interistitial compounds are those compound in which small atoms like carbon and boron fits into interistices of d-block elements crystal. in interistitial compounds, there is no chemical bond formation. chemcial properties remain almost same but physical properties may change. Q. Which of the property of interistitial compounds has the same behaviour as that of the elements?

Due to availability of vacant orbitals of sufficiently low energy, d-block elements form complexes, d-block elements have different properties such as-catalytic, magnetic, alloy formation, interistitial compounds formation. Interistitial compounds are those compound in which small atoms like carbon and boron fits into interistices of d-block elements crystal. in interistitial compounds, there is no chemical bond formation. chemcial properties remain almost same but physical properties may change. Q. Select correct statement.

Read the passage given below and answer the question: The d block elements are the 40 elements contained in the four rows of ten columns (3-12) in the periodic table. As all the d block elements are metallic, the term d-block metals is synonymous. This set of d-block elements is also often identified as the transition metals, but sometimes the group 12 elements (zinc, cadmium, mercury) are excluded from the transition metals as the transition elements are defined as those with partly filled d or f shells in their compounds. Inclusion of the elements zinc, cadmium and mercury is necessary as some properties of the group 12 elements are appropriate logically to include with a discussion of transition metal chemistry. The term transition element or transition metal appeared to derive from early studies of periodicity such as the Mendeleev periodic table of the elements. His horizontal table of the elements was an attempt to group the elements together so that the chemistry of elements might be explained and predicted. In this table there are eight groups labeled I-VIII with each subdivided into A and B subgroups. Mendeleev recognized that certain properties of elements in Group VIII are related to those of some of the elements in Group VII and those at the start of the next row Group I. In that sense, these elements might be described as possessing properties transitional from one row of the table to the next. (source: Winter, M. J. (2015). D- block Chemistry (Vol. 27). Oxford University Press, USA.) In the following question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the choices on the basis of the above passage. Assertion: Group 12 elements are not considered as transition metals. Reason: Transition metals are those which have incompletely filled d shell in their compounds.

Read the passage given below and answer the question: The d block elements are the 40 elements contained in the four rows of ten columns (3-12) in the periodic table. As all the d block elements are metallic, the term d-block metals is synonymous. This set of d-block elements is also often identified as the transition metals, but sometimes the group 12 elements (zinc, cadmium, mercury) are excluded from the transition metals as the transition elements are defined as those with partly filled d or f shells in their compounds. Inclusion of the elements zinc, cadmium and mercury is necessary as some properties of the group 12 elements are appropriate logically to include with a discussion of transition metal chemistry. The term transition element or transition metal appeared to derive from early studies of periodicity such as the Mendeleev periodic table of the elements. His horizontal table of the elements was an attempt to group the elements together so that the chemistry of elements might be explained and predicted. In this table there are eight groups labeled I-VIII with each subdivided into A and B subgroups. Mendeleev recognized that certain properties of elements in Group VIII are related to those of some of the elements in Group VII and those at the start of the next row Group I. In that sense, these elements might be described as possessing properties transitional from one row of the table to the next. (source: Winter, M. J. (2015). D- block Chemistry (Vol. 27). Oxford University Press, USA.) In the following question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the choices on the basis of the above passage. Assertion: All d block elements are metallic in nature. Reason: The d-block elements belong to Group 3 -12 of the periodic table.

Due to availability of vacant orbitals of sufficiently low energy, d-block elements form complexes, d-block elements have different properties such as-catalytic, magnetic, alloy formation, interistitial compounds formation. Interistitial compounds are those compound in which small atoms like carbon and boron fits into interistices of d-block elements crystal. in interistitial compounds, there is no chemical bond formation. chemcial properties remain almost same but physical properties may change. Q. Which of the following property gets decreased in interistitial compounds compared to that of the element?

NARAYNA-D BLOCK & TRANSITION ELEMENTS-Level-VI (H.W)
  1. The E^(0) values are Zn^(2+)//Zn:-0.76V,Fe^(2+)//Fe:-0.44V, Ni^(2...

    Text Solution

    |

  2. The E^(0) values are Zn^(2+)//Zn:-0.76V,Fe^(2+)//Fe:-0.44V, Ni^(2...

    Text Solution

    |

  3. The transition metals and their compounds have paramagnetic properties...

    Text Solution

    |

  4. The transition metals and their compounds have paramagnetic properties...

    Text Solution

    |

  5. The transition metals and their compounds have paramagnetic properties...

    Text Solution

    |

  6. The (n-1)d shell of electron in d-block elements is expanding and, the...

    Text Solution

    |

  7. The (n-1)d shell of electron in d-block elements is expanding and, the...

    Text Solution

    |

  8. Paramagnetism is a property due to the presence of unpaired electrons....

    Text Solution

    |

  9. Paramagnetism is a property due to the presence of unpaired electrons....

    Text Solution

    |

  10. Paramagnetism is a property due to the presence of unpaired electrons....

    Text Solution

    |

  11. Match the following

    Text Solution

    |

  12. Match the following

    Text Solution

    |

  13. S(1) : Mn^(2+) compounds more stable than Fe^(2+) towards oxidation to...

    Text Solution

    |

  14. In how many of the following, the second element has a higher density ...

    Text Solution

    |

  15. The number of transition metals in bronze is x, in brass is y and inGe...

    Text Solution

    |

  16. Total number of 3d-series transition elements contain either 3d^(1) or...

    Text Solution

    |

  17. How many of the following show variable oxidation states in their comp...

    Text Solution

    |

  18. Magnetic moment value for a d-block ion is 4.90 BM determine value of ...

    Text Solution

    |

  19. How many of the following ions have spin mangnetic moment more than 4...

    Text Solution

    |

  20. How many of the following compounds are diamagnetic and coloured? K(...

    Text Solution

    |