Which does not obey EAN rule?

1. [Cu(NH₃)₄]²⁺

2. [Zn(OH)₄]^2-

3. [HgI₄]^2-

4. Fe(CO)₅

EAN of Fe in K₃[Fe(CN)₆] is

1. 34

2. 35

3. 36

4. 47

Which of the following is an oxidizing agent?

(1) $\mathrm{Mn}(\mathrm{CO}{)}_5$                     

(2) $\mathrm{Fe}(\mathrm{CO}{)}_5$

(3) ${\mathrm{Mn}}_2(\mathrm{CO}{)}_{10}$                   

(4) ${\mathrm{Fe}}_2(\mathrm{CO}{)}_9$

Choose the correct option regarding the following complex compound which follows (F) and does not follow (NF) the Sidgwick EAN rule:

(I) $\left[\right({\mathrm{Ph}}_3\mathrm{P}{)}_2{\mathrm{PdCl}}_2{\mathrm{PdCl}}_2]$                     (II) $\left[\mathrm{NiBrCl}\right(\mathrm{en}\left)\right]$

(III) ${\mathrm{Na}}_4\left[\mathrm{Fe}\right(\mathrm{CN}{)}_5\mathrm{NOS}]$                       (IV) $\mathrm{Cr}\left(\mathrm{CO}{)}_3\right(\mathrm{NO}{)}_2$

        (I)    (II)    (III)    (IV)                       (I)    (II)    (III)     (IV) 

(a)    NF   NF      NF       NF                 (b)    F       F        NF        F

(c)     NF   NF      F          F                  (d)   NF      NF      F          NF 

Which of the following species can act as reducing agent ?

(1) $\left[\mathrm{Co}\right(\mathrm{CO}{)}_4{]}^{-}$     

(2) $\mathrm{Mn}(\mathrm{CO}{)}_6$       

(3) $\mathrm{Mn}(\mathrm{CO}{)}_5$       

(4) $\mathrm{Cr}(\mathrm{CO}{)}_6$

The EAN of metal atoms in $\left[\mathrm{Fe}{\left(\mathrm{CO}\right)}_2{\left({\mathrm{NO}}^{+}\right)}_2\right]<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\left(\mathrm{Co}\right)}_2{{\left(\mathrm{CO}\right)}_8}_{}$ respectively are :

1. 34, 35 

2. 34, 36

3. 36, 36                                       

4. 36, 35

Which of the following species can act as an oxidising agent?

1. $\left[\mathrm{Cr}{\left(\mathrm{CO}\right)}_6\right]$

2. $\left[\mathrm{Ni}{\left(\mathrm{CO}\right)}_4\right]$

3. $[\mathrm{Mn}{\left(\mathrm{CO}\right)}_6{]}^{+}$

4. $\left[\mathrm{V}{\left(\mathrm{CO}\right)}_6\right]$