How many geometrical isomers and stereoisomers are possible for $\left[\mathrm{Pt}\right({\mathrm{NO}}_2\left)\right({\mathrm{NH}}_3\left)\right({\mathrm{NH}}_2\mathrm{OH}\left)\right(\mathrm{Py}){]}^{+ }\mathrm{and} [\mathrm{Pt}\left(\mathrm{Br}\right)\left(\mathrm{Cl}\right)\left(\mathrm{I}\right)\left({\mathrm{NO}}_2\right)\left({\mathrm{NH}}_3\right)\left(\mathrm{Py}\right)]$    respectively?

(a) 3 and 15                 (b)  3 and 30

(c) 4 and 15                  (d) 4 and 30 

 A compound that form two stereoisomer is -

(I) $\left[\mathrm{Cr}\right({\mathrm{NO}}_3{)}_3\left({\mathrm{NH}}_3{)}_3\right]$     

(II) ${\mathrm{K}}_3\left[\mathrm{Fe}\right({\mathrm{C}}_2{\mathrm{O}}_4{)}_3]$

(III) $\left[{\mathrm{CoCl}}_2\right(\mathrm{en}{)}_2{]}^{+}$       

(IV) $\left[\mathrm{CoBrCl}\right(\mathrm{ox}{)}_2{]}^{3-}$

(1)I only     

(2) I and II   

(3) III and IV   

(4) All of these  

Three arrangements are shown for the complex $\left[{\mathrm{CoBr}}_2\right({\mathrm{NH}}_3{)}_2\left(\mathrm{en}\right){]}^{\oplus }$. Which one is wrong statement?

1. I and II are geometrical isomers 

2. II and III are optically active isomers 

3. I and III are optically active isomers

4.  II and III are geometrical isomers

A complex with the composition $[{\mathrm{MA}}_3\mathrm{B}{]}^{\mathrm{n}\pm }$ is found to have no geometrical isomers. The possible structures (s) of the complex is (Where A and B are monodentate ligands)

(1) Tetrahedral                   

(2) Square planar

(3) Both (a) and (b)             

(4) Cannot be predicted

Complexes formed in the following methods are:

(I) Mond's process for purification of nickel

(II) Removal of unreacted AgBr from photographic plate

(III) Removal of lead poisoning from the body

Options are as follows: 

$\mathrm{I} \mathrm{II} \mathrm{III}$
$\left(\mathrm{a}\right) \mathrm{Ni}(\mathrm{CO}{)}_{4 } [\mathrm{Ag}(\mathrm{CN}{)}_2{]}^{-} [\mathrm{Pb}\left(\mathrm{EDTA}\right){]}^{2-}$
$\left(\mathrm{b}\right) \mathrm{Ni}(\mathrm{CO}{)}_4 [\mathrm{Ag}({\mathrm{S}}_2{\mathrm{O}}_3{)}_2{]}^{3- } [\mathrm{Pb}\left(\mathrm{EDTA}\right){]}^{2-}$
$\left(\mathrm{c}\right) \mathrm{Ni}(\mathrm{CO}{)}_6 [\mathrm{Ag}\left({\mathrm{S}}_2{\mathrm{O}}_3\right){]}^{3-} \left[\mathrm{Pb}\right(\mathrm{EDTA}){]}^{4-}$
$\left(\mathrm{d}\right) \mathrm{Ni}(\mathrm{CO}{)}_6 [\mathrm{Ag}\left({\mathrm{S}}_2{\mathrm{O}}_3\right){]}^{-} \left[\mathrm{Pb}\right(\mathrm{EDTA}){]}^{4-}$
$$

The correct name for the complex ion $\left[\mathrm{CoCl}\right(\mathrm{ONO}\left)\right(\mathrm{en}{)}_2{]}^{+}$ is:

1. chlorobis(ethylenediamine)nitrito-O-cobaltate(III) ion

2. chlorodiethyldiaminenitrito-O-cobalt(III) ion

3. chloronitrito-O-diethyldiamine cobaltate (III) ion

4. chlorobis (ethylenediamine)nitrito-O-cobalt (III) ion

Which of the following ligand does not as $\mathrm{\pi }$-acid ligand?

(a) ${\mathrm{N}}_2$           (b) CO              (c) ${\mathrm{C}}_2{\mathrm{H}}_4$                 (d) ${\mathrm{O}}_2^{2-}$

$\left[\mathrm{Mn}\right(\mathrm{CO}{)}_4\mathrm{NO}]$ is diamagnetic because:

1. Mn metal is paramagnetic in free state

2. Mn is in +1 oxidation state in this complex

3. NO is present as positive ligand

4. All of the above

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) $\mathrm{Cr}(\mathrm{CO}{)}_6$