The incorrect option among the following is:

1.	[Co(NO2)(H2O)(en)2]Cl2, [CoCl(NO2)(en)2]Cl·H2O	Hydrate isomerism
2.	[Cu(NH3)4[PtCl4], [CuCl(NH3)3][PtCl3(NH3)]	Co-ordination isomerism
3.	[Ni(CN)(H2O)(NH3)4]Cl, [NiCl(H2O)(NH3)4]CN	Ionization isomerism
4.	[Cr(NO2)(NH3)5][ZnCl4], [Cr(NO3)(NH3)5][ZnCl4]	Linkage isomerism

Select incorrect statement among the following about complex $\left[\mathrm{Cr}\right({\mathrm{NO}}_2\left)\right({\mathrm{NH}}_3{)}_5] [\mathrm{Zn}\left(\mathrm{SCN}{)}_4\right]$:

(a) It shows co-ordination isomerism

(b) It shows optical activity 

(c) It shows linkage isomerism

(d) IUPAC name of the compound is Pentaaminenitrito-N-chromium (III) tetrathiocyanato-S-zincate(II) 

Unmatched characterstic of complex $\left[{\mathrm{PdCl}}_2\right({\mathrm{H}}_2\mathrm{O}{)}_2({\mathrm{NH}}_3{)}_2{]}^{2+}$ is :

(1) Diamagnetic                               

(2) Low spin

(3) Geometrical isomerism               

(4) Fac. and Mer. form

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) $[\mathrm{Pt}({\mathrm{NH}}_2-\underset{\underset{{\mathrm{CH}}_3}{|}}{\mathrm{C}}\mathrm{H}-\underset{\underset{{\mathrm{CH}}_3}{|}}{\mathrm{C}}\mathrm{H}-{\mathrm{NH}}_2{)}_2{]}^{2+}$           

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

(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