Effective Atomic Number

Which of the following is most easily reduced?

Which of the following obeys the $\mathrm{EAN}$ rule?

(a) $\left[\mathrm{Fe} {\mathrm{\eta }}^5-{\left({\mathrm{C}}_5{\mathrm{H}}_5\right)}_2\right] \mathrm{with} {\mathrm{Fe}}^{2+}$.

(b) $\left[\mathrm{Co}\left(\mathrm{NO}\right){\left(\mathrm{CO}\right)}_3\right] \mathrm{with} \mathrm{Co}°$.

(c) $\left[{\mathrm{Mn}}_2{\left(\mathrm{CO}\right)}_{10}\right] \mathrm{with} \mathrm{Mn}°$.

(d) $\left[\mathrm{V} {\left(\mathrm{CO}\right)}_6\right]{ }^{-}\mathrm{with} {\mathrm{V}}^{1-}$.

What is the effective atomic number of the metal atoms in ${\mathrm{Co}}_2(\mathrm{CO}{)}_8$?

The effective atomic number of copper in $\left[\mathrm{Cu}\right({\mathrm{NH}}_3{)}_4{]}^{ 2+}$ is

Identify complex ion in which effective atomic number of the central metal ion is $35$. (Given Atomic number of $\mathrm{Co}=27, \mathrm{Fe}=26, \mathrm{Zn}=30$)

Calculate the effective atomic number (EAN) of the central metal atom in the compound, $\mathrm{Cr}(\mathrm{CO}{)}_6$.

Calculate the effective atomic number (EAN) of the central metal atom in the compound, ${\mathrm{K}}_3\left[\mathrm{Fe}\right(\mathrm{CN}{)}_6]$.

$\mathrm{EAN}$ of iron in ${\mathrm{K}}_4\left[\mathrm{Fe}(\mathrm{CN}{)}_6\right]$ is

For the given compounds $\left[\mathrm{Fe}{\left({\mathrm{CN}}_6\right)}^{-4}\mathrm{ }\right],\mathrm{ }{\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{-2}$ and $\left[\mathrm{Ni}{\left(\mathrm{CO}\right)}_4\right]$ which of the following statement is correct? 

What should be the value of  X in $\mathrm{N}\mathrm{i}{\left(\mathrm{C}\mathrm{O}\right)}_{\mathrm{x}}$ according to EAN rule?

Among the given complex compounds EAN rule is not obeyed by 

Among the following complexes, the complex which can be reduced easily is :

The carbonyl metal complex which cannot exist:

Among the following coordination compounds, which will behave as a reducing agent?

In the carbonyl compound ${\mathrm{Fe}}_2(\mathrm{CO}{)}_9$ what is the EAN of $\mathrm{Fe}$:

Which of the following pairs of compound has same EAN value but does not obey sidgwick EAN rule?

EAN of the metal atom are equal in :

Which of the following has the maximum E.A.N of the central atoms? $(\mathrm{Cr} = 24, \mathrm{Co} = 27, \mathrm{Fe} = 26, \mathrm{Ni} = 28)$

Effective atomic number (EAN) of $\text{Mn}$ in $\left[{\text{Mn}}_{\text{2}}{\text{(CO)}}_{\text{10}}\right]$ is

The EAN value of iron in potassium ferricyanide is