The following complexes are given :

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

(2) $\mathrm{cis}-\left[\mathrm{Co}\right({\mathrm{NH}}_3{)}_2(\mathrm{en}{)}_2{]}^{3+}$

(3) $\mathrm{trans}-\left[\mathrm{Co}\right({\mathrm{NH}}_3{)}_2(\mathrm{en}{)}_2{]}^{3+}$

(4) ${\mathrm{NiCl}}_4^{2-}$

(5) ${\mathrm{TiF}}_6^{2-}$

(6) ${\mathrm{CoF}}_6^{3-}$

Choose the correct code:

(a) (1),(2) are optically active, (3) is optically inactive

(b) (2) is optically active ; (1), (3) are optically inactive

(c) (4), (5) are coloured and (6) is colourless

(d) (4) is coloured and (5),(6) are colourless

Which of the following coordination compounds can show geometrical isomerism?

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