In the nitroprusside ion,iron and $NO$ exist as $Fe^{II}$ and $NO^{+}$ instead of $Fe^{III}$ and $NO$. Which method is used to confirm this?

  • A
    Measuring the concentration of iron
  • B
    Measuring the concentration of $CN^{-}$
  • C
    Measuring the magnetic moment in the solid state
  • D
    Thermally decomposing the compound

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Total number of isomers possible for the complex $[Co(en)_2Cl_2]$ is

Identify the incorrect match from the following:

The spin-only magnetic moment in $BM$ of $[Fe(CO)_4(C_2O_4)]^+$ is:

Consider the following low-spin complexes: $K_3[Co(NO_2)_6]$,$K_4[Fe(CN)_6]$,$K_3[Fe(CN)_6]$,$Cu_2[Fe(CN)_6]$,and $Zn_2[Fe(CN)_6]$. The sum of the spin-only magnetic moment values of complexes having yellow colour is $.......... B.M.$ (answer is nearest integer).

Which one of the following has the largest number of isomers?
($R$ = alkyl group; $en$ = ethylenediamine)

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