Which of the following statement is true?

(a) In $\left[{\mathrm{PtCl}}_2\right({\mathrm{NH}}_3{)}_2{]}^{2+}$ the cis form is optically inactive while trans form is optically active

(b) In $\left[\mathrm{Fe}\right({\mathrm{C}}_2{\mathrm{O}}_4{)}_3{]}^{3-}$ , geometrical isomerism does not exist while optical isomerism exists 

(c) In Mabcd, square planar complexes show both optical as well as geometrical isomerism

(d) In Mabcd tetrahedral complex, optical isomerism cannot be observed

 

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