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, ${\mathrm{K}}_3\left[\mathrm{Fe}\right(\mathrm{CN}{)}_6]$.

In the metal carbonyls of the general formula $\mathrm{M}{\left(\mathrm{CO}\right)}_{\mathrm{x}}$ (Which follows EAN rule) if $\mathrm{M}$ is $\mathrm{Ni}, \mathrm{Fe}$ and $\mathrm{Cr}$ the value of $\mathrm{x}$ will be respectively:

$\left[\mathrm{Hg}{\left({\mathrm{NH}}_3\right)}_4\right]\left[\mathrm{Co}{\left(\mathrm{NCS}\right)}_4\right]$ complex has

In $\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_4\right]{\mathrm{SO}}_4$, the $\mathrm{E}.\mathrm{A}.\mathrm{N}.$ of $\mathrm{Ni}$ is :-

Which is not form mononuclear carbonyl in a neutral complex is :-

Which complex does not follow $\mathrm{EAN}$ rule?

Maximum number of  $\text{'}\mathrm{CO}\text{'}$  ligand that can be replaced by $\mathrm{NO}$ ligands in $\left[\mathrm{Cr}{\left(\mathrm{CO}\right)}_6\right]$ is:

Which of the following complexes does not follow Sidgwick $\mathrm{EAN}$ rule and acts as an oxidising agent ?

$\mathrm{EAN}$ of $\left[\mathrm{Fe}\left({\mathrm{\eta }}^5-{\mathrm{C}}_5{\mathrm{H}}_5\right)(\mathrm{CO}{)}_2\mathrm{Cl}\right]$ :-

In $\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_4\right]{\mathrm{SO}}_4$, the E.A.N of $\mathrm{Ni}$ is:

In which of the following pairs, the $\mathrm{EAN}$ of central metal atom is not same?

$\mathrm{EAN}$ 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? 

$\mathrm{Cyclopentadiene}+\mathrm{Na}\to \mathrm{C}+{\mathrm{H}}_2\mathrm{ }$

$2\mathrm{C}+{\mathrm{FeCl}}_2\to \mathrm{D}+2\mathrm{NaCl}$
The statement not true about D is