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Paramagnetic pairs (s) among the followi...

Paramagnetic pairs (s) among the following is (are) .

A

`[BaO_(2),NO_(2)]`

B

`[KO_(2),NO]`

C

`[H_(2)O_(2),NO]`

D

`K_(3)[Fe(CN)_(6)],CuCI_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B, D
In (b) `O_(2)^(Θ)` (peroxide ion) and` ( :overset(.)N = overset(..)O: )` have one unpaired `e^(-)` paramagnetic
In `K_(3)[Fe(CN)_(6)]` has `Fe^(+3)` as a central metal ion it has five unpaired `e^(-')s` and is paramagnetic ion it has five unpaired `e^(-')s` and is paramagnetic
`Fe (Z =26) implies 3d^(6) 4s^(2), Fe^(+3) implies 3d^(5) 4s^(0)`
`CuCI_(2)` has `Cu^(2+)` ion it has one unpaired `e^(-)` and is paramagnetic
`Cu (Z =29) implies 3d^(10) 4s^(1) Cu^(+2) implies 3d^(9) 4s^(0)` .
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Knowledge Check

  • Antacid pair among the following is

    A
    `Mg(OH)_(2), NaOH`
    B
    `Mg(OH)_(2), Al(OH)_(3)`
    C
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    D
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  • Antacid pair among the following is

    A
    `Ma(OH)_(2), NaOH`
    B
    `Mg(OH)_(2), A1(OH)_(3)`
    C
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    D
    `A1(OH)_(3), NaOH`

  • The paramagnetic ion among the following is

    A
    `[Ni(CN)_(4)]^(2-)`
    B
    `[Mn(CN)_(6)]^(4-)`
    C
    `[Zn(NH_(3))_(4)]^(2+)`
    D
    All of these

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