The spin-only magnetic moments of $\left[ Mg ( CN )_6\right]^{2-}$ and $\left[ MnBr _4\right]^{2-}$ in Bohr magnetons, respectively are

  • [KVPY 2011]
  • A
    $5.92$ and $5.92$
  • B
    $4.89$ and $1.73$
  • C
    $1.73$ and $5.92$
  • D
    $1.73$ and $1.73$

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$(I)$ $ZnCl_2$ is ionic whereas $CdCl_2$ and $HgCl_2$ are covalent

$(II)$ $Zn$ and $Cd$ dissolves in dilute acid $(HCl)$ liberating $H_2$ but $Hg$ can not

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  • [AIEEE 2006]

Vanadium $(III) $ oxide is a strong

Stainless steel is non-corrosive. This character is more prominent in