Question

Which among the following statements is incorrect for manganate and permanganate ions?

• A. Both ions are tetrahedral structure
• B. In both the ions, $p\pi -d\pi$ bonding is observed between oxygen and manganese
• C. Both ions are paramagnetic
• D. Permanganate is stronger oxidizing agent than manganate

Answer 1

Answer: (C)

$\Rightarrow$ Tetrahedral
$\Rightarrow d\pi (Mn)-p\pi (O)$ is present.
$\Rightarrow$ Paramagnetic, due to presence of one unpaired $d$-electron of
$M{n}^{+6}\left(3d^{\prime }\right)$ of $Mn{O}_4{}^{2-}$
$\Rightarrow$ Oxidising agent.

$\Rightarrow$ Tetrahedral
$\Rightarrow d\pi (Mn)-p\pi (O)$ is present.
$\Rightarrow$ Diamagnetic, due to the absence of unpaired $d$-electron in $M{n}^{+7}\left(3d^0\right)$
of $Mn{O}_4^{-}$
$\Rightarrow$ Stronger oxidising agent.