The "spin-only" magnetic moment [ in units of Bohrmagneton, $(\mu _B )$ ] of $Ni^{2+}$ in aqueous solution would be (At. No. $Ni= 28)$

  • [AIEEE 2006]
  • A

    $6$

  • B

    $1.73$

  • C

    $2.84$

  • D

    $4.90$

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