Choose the correct code regarding, possible number of geometrical isomers exhibited by the following complexes:

(I) $\left[{\mathrm{CrCl}}_2\right({\mathrm{NO}}_2{)}_2({\mathrm{NH}}_3{)}_2{]}^{-}$                        (II) $\left[\mathrm{Co}\right({\mathrm{NO}}_2{)}_3\left({\mathrm{NH}}_3{)}_3\right]$

(III)  $\mathrm{PtCl}\left({\mathrm{NO}}_2\right({\mathrm{NH}}_3\left)\right(\mathrm{py}\left)\right]$                      (IV) $\left[\mathrm{PtBrCl}\right(\mathrm{en}\left)\right]$
 

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

1.      4        2         3        1

2.      5        2        4         0

3.      3       2         0         1
 
4.      5        2        3         0

Total number of geometrical isomers  possible for complex $\left[\mathrm{Mab}\right(\mathrm{AB}{)}_2{]}^{\mathrm{n}\pm }$ are : 

(1) 5         

(2)  4       

(3)  3         

(4)  6

$\left[{\mathrm{CoCl}}_2\right({\mathrm{NH}}_3{)}_4{]}^{+}<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{Cl}}^{-}\stackrel{}{\to }<mspace\; width="1em"></mspace>\left[{\mathrm{CoCl}}_3\right({\mathrm{NH}}_3{)}_3]<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>{\mathrm{NH}}_3$ . If in this reaction two isomers of the product are obtained , the true statement for the initial (reactant) complex is :

(1) Compound is in cis-form .                      

(2) Compound is in trans-form.

(3) Compound is in both (cis and trans) form.

(4) Can't be predicted .

Select the correct statement about the given square planar complex :

1.  It has no geometrical isomer

2.  It is optically active because square planar complexes do not have a plane of symmetry

3.  It is optically inactive because a square planar complex has a plane of symmetry

4.  It is optically active because it has a symmetric carbon

Select the correct code regarding total number of space isomers for the following compounds:

(I)$[{\mathrm{Ma}}_3{\mathrm{b}}_2\mathrm{c}{]}^{\mathrm{n}\pm }$          (II) $\left[\mathrm{M}\right(\mathrm{AB}{)}_3{]}^{\mathrm{n}\pm }$      (III) $[{\mathrm{Ma}}_2{\mathrm{b}}_2{\mathrm{c}}_2{]}^{\mathrm{n}\pm }$

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

(a)             4           4           6                       (b)      4            3           5

(c)              3          3            5                      (d)       3            4           6

How many geometrical isomers are possible or $\left[{\mathrm{Pd}}^{2+}\right({\mathrm{NH}}_2-\mathrm{CH}\left({\mathrm{CH}}_3\right)-{\mathrm{CO}}_2^{-}{)}_2]$

(a) 2          (b)  3         (c)  4           (d)  6

Total number of stereisomers of $\left[\mathrm{Co}\right(\mathrm{acac}{)}_2\mathrm{BrCl}{]}^{⊝}$ are:

(1) 4         

(2) 3         

(3) 6           

(4) 2

Which of the following complex compound exhibits geometrical isomerism?

(1) $\left[\mathrm{Fe}\right(\mathrm{DMG}{)}_2$                         

(2) $\left[\mathrm{Be}\right(\mathrm{gly}{)}_2]$

(3) $\left[\mathrm{PdClBr}\right(\mathrm{gly}\left)\right]$                       

(4) $\left[\mathrm{Cd}\right({\mathrm{NH}}_3\left)\mathrm{Cl}\right(\mathrm{gly})$

In which case the racemic mixture is obtained by mixing its mirror images (d & l form) in 1:1 molar ratio?

1. [Co(gly)₃]                            

2. [Ni(DMG)₂]

3. cis-[Cu(gly)₂]                              

4. [Zn(en)(gly)]⁺

Which of the following compound shows optical isomerism?

(1) cis-$\left[{\mathrm{CrCl}}_3\right({\mathrm{NH}}_3{)}_3]$                         

(2) cis-$\left[\mathrm{Co}\right({\mathrm{NH}}_3{)}_4{\mathrm{Cl}}_2{]}^{+}$

(3) $\left[\mathrm{Co}\right(\mathrm{en}{)}_3{]}^{3+}$                                   

(4) trans-$\left[\mathrm{Co}\right(\mathrm{en}{)}_2{\mathrm{Cl}}_2{]}^{+}$