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The pair having the same magnetic moment...

The pair having the same magnetic moment is
[at. No. `Cr = 24, Mn = 25, Fe = 26 " and " Co = 27]`

A

`[Cr(H_(2)O)_(6)]^(2+)` and `[CoCl_(4)]^(2-)`

B

`[Cr(H_(2)O)_(6)]^(2+) and [Fe(H_(2)O)_(6)]^(2+)`

C

`[Mn(H_(2)O)_(6)]^(2+) and [Cr(H_(2)O)_(6)]^(2+)`

D

`[CoCl_(4)]^(2-) and [Fe(H_(2)O)_(6)]^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
B
`[Ci(H_(2)O)_(6)]^(2+):Cr^(2+)=[Ar]3d^(4)4s^(0)`

Thus, `[Cr(H_(2)O)_(6)]^(2+)` and `[Fe(H_(2)O)_(6)]^(2+)` have the same number of unpaired electrons and hence have same magnetic moment.
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The pair having the same magnetic moment is_________. [ At. No. :Cr = 24, Mn =25 , Fe= 26 , Co =27]

Which one of the following cyano complexes would exhibit the lowest value of paramagnetic behaviour ? (At. Nos : Cr = 24, Mn = 25, Fe = 26, Co = 27)

Knowledge Check

  • The pair having the same magnetic moment is : [At. No. : Cr = 24 , Mn= 25 , Fe=26 , Co=27]

    A
    `[Mn(H_2 O)_6]^(2+) and [Cr(H_2 O)_6]^(2+)`
    B
    `[Co(Cl_4]^(2-) and [Fe(H_2 O)_6]^(2+)`
    C
    `[Cr(H_2 O)_6]^(2+) and [CoCl_4]^(2-)`
    D
    `[Cr(H_2 O)_6]^(2+) and [Fe(H_2 O)_6]^(2+)`

  • The pair in which species have the same magnetic moment is:

    A
    `"["Cr(H_(2)O)^(6)"]"^(2+)[CoCl_(4)]^(2-)`
    B
    `"["Cr(H_(2)O)^(6)"]"^(2+)[Fe(H_(2)O_(6))]^(2+)`
    C
    `"["Mn(H_(2)O)^(6)"]"^(2+)[Cr(H_(2)O)_(6)]^(2+)`
    D
    `"["CoCl_(4)"]"^(2-)[Cr(H_(2)O)_(6)]^(2+)`

  • Which one of the cyano complexes would exhibit the lowest value of para magnetic behaviour ? (At. No. Cr = 24, Mn = 25, Fe = 26, Co = 27)

    A
    `|Cr(CN)_(6)|^(3-)`
    B
    `|Mn(CN)_(6)|^(3-)`
    C
    `|Fe(CN)_(6)|^(3-)`
    D
    `|Co(CN)_(6)|^(3-)`

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    The pair in which both species have same magnetic moment is -

    Which of the following species is expected ot show the highest magnetic moment? (At.Nos.: Cr = 24, Mn = 25, Co = 27, Ni = 28, Cu = 29 )

    For the four successive transition elements (Cr, Mn, Fe, and Co), the stability of +2 oxidation state will be there in which of the following order ? (At. Nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)

    The complex which has no 'd' electrons in the central atom is (Atomic number, Cr= 24, Mn = 25, Fe = 26, Co = 27)

    The complex which has no 'd' electrons in the central atom is (Atomic number, Cr= 24, Mn = 25, Fe = 26, Co = 27)

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