MCQ
In which complex is the transition metal in zero oxidation state :
- A$[Co(NH_3)_6]Cl_2$
- B$[Fe(H_2O)_6SO_4]$
- C$[Ni(CO)_4]$
- ✓$[Fe(H_2O)_3](OH)_2$
✓
Answer
Correct option: D.
$[Fe(H_2O)_3](OH)_2$
d
$MnO _4^{-}$, has $Mn ^{+7}, d ^0$ configuration so no $d$ electron.
$MnO _4^{-}$, has $Mn ^{+7}, d ^0$ configuration so no $d$ electron.
$Co ^{+3}, d ^6$ configuration.
$Fe ^{-2}, d ^6$ configuration.
$Cr ^{+3}, d ^3$ configuration.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Major product formed in the following reaction is a mixture of:
In the nitrogen family the $H - M - H$ bond angle in the hydrides $M{H_3}$ gradually becomes closer to ${90^o}$ on going from $N$ to $Sb$. This shows that gradually
→Which of the following explains the increase of the reaction rate by catalyst ?
The relationship between standard reduction potential of cell and equilibrium constant is shown by
Nucleic acids are the polymers of $.......$
→The product obtained from the electrolytic oxidation of acidified sulphate solution, is:
Complexes given below show
In the reaction sequence :
→$\begin{array}{*{20}{c}}
{C{H_3} - CH - COOH} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{OH\,\,\,\,\,\,\,\,\,}
\end{array}\xrightarrow{\Delta }[Y]$
$[Y]$ will be :
$C{l_2}$ reacts with $C{S_2}$ in presence of ${I_2}$ catalyst to form
→$2.5 \mathrm{~g}$ of a non-volatile, non-electrolyte is dissolved in $100 \mathrm{~g}$ of water at $25^{\circ} \mathrm{C}$. The solution showed a boiling point elevation by $2^{\circ} \mathrm{C}$. Assuming the solute concentration in negligible with respect to the solvent concentration, the vapour pressure of the resulting aqueous solution is . . . . . . $\mathrm{mm}$ of $\mathrm{Hg}$ (nearest integer)
→[Given : Molal boiling point elevation constant of water $\left(\mathrm{K}_{\mathrm{b}}\right)=0.52 \mathrm{K.} \mathrm{kg} \mathrm{mol}^{-1}$,
$1 \mathrm{~atm}$ pressure $=760 \mathrm{~mm}$ of $\mathrm{Hg}$, molar mass of water $\left.=18 \mathrm{~g} \mathrm{~mol}^{-1}\right\rfloor$