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 can show geometrical isomerism?

(1) \([Pt\big((NH_2-CH(CH_3)-CH(CH_3)-NH_2)_2\big]^{2+}\)

(2) \([Co(en)_2(NH_3)Cl]^{2+}\)

(3) Both (a) and (b)

(4) None of these

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

Complex compound(s) which is optical active and does not depend upon the orientation

of the ligands around metal cation :

(i) $\left[{\mathrm{CoCl}}_3\right({\mathrm{NH}}_3{)}_3]$                      (ii) $\left[\mathrm{Co}\right(\mathrm{en}{)}_3{\mathrm{Cl}}_3$

(iii)$\left[\mathrm{Co}\right({\mathrm{C}}_2{\mathrm{O}}_4{)}_2({\mathrm{NH}}_3{)}^{-}$                (iv) $\left[{\mathrm{CrCl}}_2\right({\mathrm{NH}}_3{)}_{2}9\left(\mathrm{en}\right){]}^{+}$

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

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

(a)     4        2         3         1         

(b)     5        2        4           0
(c)      3       2          0         1         
(d)      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