Which of the following coordination compounds can show geometrical isomerism?

1. [Pt{(NH₂–CH(CH₃)–CH(CH₃)–NH₂)}₂]²⁺
2. [Co(en)₂(NH₃)Cl]²⁺
3. Both (1) and (2)
4. None of the above

Which of the following complex compound exhibits cis-trans isomerism?

1. $\left[\mathrm{CoCl}\right({\mathrm{NH}}_3{)}_4\left({\mathrm{H}}_2\mathrm{O}\right)]$                     
2. $\left[{\mathrm{PtCl}}_2\right({\mathrm{NH}}_3{)}_2]$
3. $\left[{\mathrm{CoCl}}_2\right({\mathrm{NH}}_3{)}_4]$                             
4. All of the above

Which of the following will have three stereoisomeric forms?

(i) $\left[\mathrm{Cr}\right({\mathrm{NO}}_3{)}_3\left({\mathrm{NH}}_3{)}_3\right]$                 (ii) ${\mathrm{K}}_3\left[\mathrm{Co}\right({\mathrm{C}}_2{\mathrm{O}}_4{)}_3]$

(iii) ${\mathrm{K}}_3\left[{\mathrm{CoCl}}_2\right({\mathrm{C}}_2{\mathrm{O}}_4{)}_2]$               (iv) $\left[\mathrm{CoBrCl}\right(\mathrm{en}{)}_2]$

(a) (iii) and (iv )     (b) (i),(iii) and (iv)       (c) (iv) only       (d) All four 

A coordination complex of type ${\mathrm{MX}}_2{\mathrm{Y}}_2$ (M-metal ion;X,Y monodentate ligands ), can have either a tetrahedral or a square planar geometry . The maximum number of possible isomers in these two cases are respectively:

(1) 1 and 2     

(2) 2 and 1     

(3) 1 and 3       

(4) 3 and 2

The ratio of cis and trans-isomers of the complex $[{\mathrm{Ma}}_2\mathrm{bcde}{]}^{\mathrm{n}\pm }$ is:

(1) 5:3       

(2) 2:1       

(3) 7:3     

(4) 3:1

$\left[{\mathrm{PdCl}}_2\right({\mathrm{PMe}}_3{)}_2]$ is a diamagnetic complex of Pd(II). How many total isomers are possible of analogous paramagnetic complex of Ni(II)?

1. Zero         

2. 1             

3. 2         

4. 3

Which of the following coordination complexes are optically active and whose optical activity does not depend on the orientation (arrangement) of ligands around the metal cation?

(i) [CoCl₃(NH₃)₃]
(ii) [Co(en)₃]³⁺
(iii) [Co(C₂O₄)₂(NH₃)₂]⁻
(iv) [CrCl₂(NH₃)₂(en)]⁺

1.  (ii),(iii) and (iv)   

2.  (i),(ii) and (iv)     

3.   (ii) and (iv)     

4.  only (ii)

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

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