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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Assertion : $SnI_4$ is an orange solid.

Reason : The colour arises due to charge transfer.

  • [AIIMS 2007]

The transition metal ions responsible for colour in ruby and emerald are, respectively

  • [JEE MAIN 2016]

The metal commonly present in brass and german silver is