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The paramagnetic species among the follo...

The paramagnetic species among the following is- `Na^(+), Zn^(2+), Cu^(+), Fe^(3+)`

A

`Na^(+)`

B

`Zn^(2+)`

C

`Cu^(+)`

D

`Fe^(3+)`

Text Solution

Verified by Experts

The correct Answer is:
D
Paramagnetic species have at least one unpaired electron. Write the electronic configurationa dn observe the unpaired orbitals.
`Na^(+) : 1s^(2), 2s^(2), 2p^(6) -` all paired:
(11)
`ZN^(2+), 1s^(2),2s^(2)2p^(6), 3s^(2) 3p^(6)3d^(10)` 0 All paired
(30)
`Cu^(+): 1s^(2),2s^(2)2s^(6), 3s^(2)3p^(6)3d^(10)` - All paired
(29)
`Fe^(3+): 1s^(2),2s^(2), 2p^(6), 3s^(2) 3p^(6) 3d^(5) -` Unpaired orbitals
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Knowledge Check

  • The diamagnetic species among the following is: Cu^(2+) , Cr^(3+), Co^(3+) , Cd^(2+)

    A
    `Cu^(2+)`
    B
    `Cd^(2+)`
    C
    `Cr^(3+)`
    D
    `Co^(3+)`

  • Assuming 2s-2p mixing is NOT operative, the paramagnetic species among the following is .

    A
    `Be_(2)`
    B
    `B_(2)`
    C
    `C_(2)`
    D
    `N_(2)`

  • Increasing order of magnetic monent among the following species is Na^(+),Fe^(+3),CO^(2+),Cr^(+2)

    A
    `Na^(+) lt CO^(2+) lt Cr^(+2) lt Fe^(3+)`
    B
    `Fe^(3+) lt Cr^(2+)ltCo^(+2)ltFe^(3+) lt Na^(+)`
    C
    `Na^(+)ltCr^(2+)ltCo^(+2)ltFe^(3+)`
    D
    `Na^(+)ltFe^(3+)ltCr^(2+)ltCo^(+2)`

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    The species which is not paramagnetic among the following is

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