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Which of the following pair of transitio...

Which of the following pair of transition metal ions have the same calculated values of magnetic moment?

A

`Ti^(2+) and V^(2+)`

B

`Fe^(2+) and Cu^(2+)`

C

`Cr^(2+) and Fe^(2+)`

D

`Co^(2+) and Ti^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
C
`Cr^(2+) (Z=24) , [Ar]3d^(4) 4s^(0)`, so, four unpaired electrons.
`Fe^(2+) (Z = 26), [Ar]3d^(6) 4s^(0)`, four unpaired electrons.
`Cr^(2+) and Fe^(2+)` have the same number of unpaired electrons, hence, they have the same value of magnetic moment.
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Knowledge Check

  • Which of the following have transition metal?

    A
    Haemoglobin
    B
    Vitamin `B_(12)`
    C
    Cis-platin
    D
    Chorophyll

  • Which of the following transition metal ions is colourless ?

    A
    `V^(2+)`
    B
    `Cr^(3+)`
    C
    `Zn^(2+)`
    D
    `Ti^(3+)`

  • Which of the following transition metal ion is not coloured?

    A
    `Cu^(+)`
    B
    `V^(3+)`
    C
    `Co^(2+)`
    D
    `Ni^(2+)`

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