MCQ
Which of the following complex represent maximum stability ?
  • $[Co(CN)_6]^{3-}$
  • B
    $[Co(H_2O)_6]^{3+}$
  • C
    $[Co(CN)_6]^{4-}$
  • D
    $[Co(C_2O_4)_3]^{3-}$

Answer

Correct option: A.
$[Co(CN)_6]^{3-}$
a
stability \propto strength of ligand \propto $+ve$ charge

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A layer of coke is spread over bauxite during electrolytic reduction of alumina by Hall-Heroult process. This layer acts as a/an:
Equivalent weight of $H_3PO_2$ when it dispropertinate in to $PH_3$ and $H_3PO_3$ is
 
In neutral or faintly alkaline solution, $8$ moles of permanganate anion quantitatively oxidize thiosulphate anions to produce $X$ moles of a sulphur containing product. The magnitude of $X$ is
Given
$
\begin{array}{l}
C_{\text {graphite }}+O_2 \rightarrow CO_2(g): \\
\Delta_{r} H^0=-393.5 KJ / mol
\end{array}
$
$
H_2(g)+\frac{1}{2} O_2(g) \rightarrow H_2 O(l)
$
$
\Delta_r H^0=-285.8 kJ / mol
$
$
CO_2(g)+2 H_2 O(l) \rightarrow CH_4(g)+2 O_2(g):
$
$
\Delta_r H^0=+890.3 kJ mol^{-1}
$
Based on the above thermochemical equations, the value of $\Delta_r H^0$ at 298 K for the reaction
$
C_{\text {(graphite) }}+2 H_2(g) \rightarrow CH_4(g) \text { will be : }
$
Given are $E^o$ values for some half reactions

$ {I_2} + 2{e^ - } \to \,2{I^ - }\,;\,\,{E^o}\, = \,\,0.54\,\,V $

$ MnO_4^ - \, + \,8{H^ + }\, + \,5{e^ - } \to \,M{n^{2 + }}\, + \,4{H_2}O\,;\,{E^{o\,}} = 1.52\,\,V $

$ F{e^{3 + }} + {e^ - } \to \,\,F{e^{2 + }}\,;\,\,{E^o}\, = \,\,0.77\,\,V $

$ S{n^{4 + }} + 2{e^ - } \to \,\,S{n^{2 + }}\,;\,\,{E^o}\, = \,\,0.1\,\,V $

 The strongest reducant and oxidant respectively are 

Which of the following has minimum freezing point
Which of the following sets of reagents, used in the order shown, would be enable for the preparation of $p-$ chlorophenol from $p-$ chloronitrobenzene ?
$20\,ml$ of $HCl$ solution requires $19.85\,ml$ of $0.01\,M\,\,NaOH$ solution for complete neutralization. The molarity of $HCl$ solution is
Which ionic compound has the largest amount of lattice energy?
The catalyst used in contact process is