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

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) $\left[{\mathrm{CrCl}}_2\right({\mathrm{NH}}_3{)}_{2}9\left(\mathrm{en}\right){]}^{+}$

Choose the correct code regarding, possible number of geometrical isomers exhibited by 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)                    (I)     (II)     (III)      (IV)   

Total number of geometrical isomers  possible for complex $\left[\mathrm{Mab}\right(\mathrm{AB}{)}_2{]}^{\mathrm{n}\pm }$ are : 

Select the correct code regarding total number of space isomers for the following compounds:

(I)$[{\mathrm{Ma}}_3{\mathrm{b}}_2\mathrm{c}{]}^{\mathrm{n}\pm }$          (II) $\left[\mathrm{M}\right(\mathrm{AB}{)}_3{]}^{\mathrm{n}\pm }$      (III) $[{\mathrm{Ma}}_2{\mathrm{b}}_2{\mathrm{c}}_2{]}^{\mathrm{n}\pm }$

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

How many geometrical isomers are possible or $\left[{\mathrm{Pd}}^{2+}\right({\mathrm{NH}}_2-\mathrm{CH}\left({\mathrm{CH}}_3\right)-{\mathrm{CO}}_2^{-}{)}_2]$

Total number of stereisomers of $\left[\mathrm{Co}\right(\mathrm{acac}{)}_2\mathrm{BrCl}{]}^{⊝}$ are:

Which of the following complex compound exhibits geometrical isomerism?

In which case racemic mixture is obtained on mixing its mirror images (d & l form) in 1:1 molar ratio?

Which of the following compound shows optical isomerism?

Match List-I with List-II and select the correct answer using the codes given below:

                     List-I                                                          List-II     

                (Ion involved)                                                 (agent)    

(i)               ${\mathrm{Ni}}^{2+}$                                                   (A) Sodium thiosulphate

(ii)              ${\mathrm{Ag}}^{+}$                                                    (B) Sodium nitroprusside

(iii)             ${\mathrm{Cu}}^{2+}$                                                  (C) Ammonia

(iv)             ${\mathrm{S}}^{2-}$                                                    (D) Dimethylglyoxime

       (i)      (ii)      (iii)       (iv)                              

The correct IUPAC name among the following is -

Which of the following are bidentate monoanion ligands?

(a) Acetylacetonato

(b) Oxylato ion

(c) Dimethylglyoximato

Select the following answer using the codes given below :

A complex cation is formed by Pt (in some oxidation state) with ligands (in proper number so that coordination number of Pt becomes six). Which of the following can be its correct IUPAC name?

Which of the following is not correctly matched?

The EAN of metal atoms in $\left[\mathrm{Fe}{\left(\mathrm{CO}\right)}_2{\left({\mathrm{NO}}^{+}\right)}_2\right] \mathrm{and} {\left(\mathrm{Co}\right)}_2{{\left(\mathrm{CO}\right)}_8}_{}$ respectively are :

Match the complex ions listed in column-I with the characteristics listed in column-II using the codes given below.

Column-I                                                        Column-II

(a) ${\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_6\right]}^{2+}$                                     (p) ${\mathrm{d}}^2{\mathrm{sp}}^3$ and diamagnetic

(b) ${\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$                                     (q) ${\mathrm{sp}}^3{\mathrm{d}}^2$ and diamagnetic

(c) ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$                                     (r) ${\mathrm{sp}}^3{\mathrm{d}}^2$ and two unpaired electrons.

(d) ${\left[\mathrm{Zn}{\left({\mathrm{NH}}_3\right)}_6\right]}^{2+}$                                     (s) ${\mathrm{d}}^2{\mathrm{sp}}^3$ and three unpaired electrons.

$$\begin{gathered} \mathrm{a} \mathrm{b} \mathrm{c} \mathrm{d} \\ \left(1\right) \mathrm{r} \mathrm{s} \mathrm{p} \mathrm{q} \\ \left(2\right) \mathrm{s} \mathrm{r} \mathrm{q} \mathrm{p} \\ \left(3\right) \mathrm{r} \mathrm{s} \mathrm{q} \mathrm{p} \\ \left(4\right) \mathrm{p} \mathrm{q} \mathrm{r} \mathrm{s} \end{gathered}$$

Which of the following statements is correct?

(A) ${\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+} \left(\mathrm{aq}\right) \mathrm{and} {\left[\mathrm{Cr}{\left(\mathrm{CN}\right)}_6^{}\right]}^{4-} \left(\mathrm{aq}\right)$ are high spin and low spin complexes respectively but

     both have same number of unpaired electrons.

(B) ${\left[\mathrm{V}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$ is inner orbital complex and paramagnetic with two unpaired electrons.

(C) ${\left[\mathrm{Co}\left({\mathrm{CN}}_6\right)\right]}^{4-}$ is outer orbital complex and paramagnetic with three unpaired electrons.

(D) $\left[\mathrm{Mn}{\left(\mathrm{NO}\right)}_3\left(\mathrm{CO}\right)\right]$ is square planar and diamagnetic.

Assertion : In complex $\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_4 \mathrm{BrCl}\right]\mathrm{Cl},$ the 'spin only' magnetic moment is close to 1.73 B.M.

Reason : All known mononuclear complexes of chromium (III), irrespective of the strength of the

               ligand field, must have three unpaired electrons.

All the following complex ions are found to be paramagnetic

$\mathrm{P} : {\left[{\mathrm{FeF}}_6\right]}^{3-}; \mathrm{Q} : {\left[{\mathrm{COF}}_6\right]}^{3-}; \mathrm{R} : {\left[\mathrm{V}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}; \mathrm{S} : {\left[\mathrm{Ti}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$

The correct order of their paramagnetic moment (spin only) is

Among $\left[{\mathrm{NiCl}}_2{\left({\mathrm{PPh}}_3\right)}_2\right], \left[\mathrm{Ni}{\left(\mathrm{HDMG}\right)}_2\right] \mathrm{and} \left[\mathrm{Ni}{\left(\mathrm{CO}\right)}_4\right]$ complexes the hybridisation states of Ni atom are respectively.

Amongst ${\left[\mathrm{Co}{\left(\mathrm{ox}\right)}_3\right]}^{3-}, {\left[{\mathrm{CoF}}_6\right]}^{3-} \mathrm{and} {\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$ : 

All the following complexes show decrease in their weights when placed in a magnetic balance then the group of complexes having tetrahedral geometry is :

(i) $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$              (ii) $\mathrm{K}\left[{\mathrm{AgF}}_4\right]$           (iii) ${\mathrm{Na}}_2\left[\mathrm{Zn}{\left(\mathrm{CN}\right)}_4\right]$            (iv) ${\mathrm{K}}_2\left[{\mathrm{PlCl}}_4\right]$          (V) $\left[\mathrm{RhCl}{\left({\mathrm{PPh}}_3\right)}_3\right]$

The 'brown ring' formed at the junction of two layers in the test of nitrate is due to the formation of a complex ion, ${\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_5\mathrm{NO}\right]}^{2+}.$ Which of the following statemens are correct for this complex [u=3.87 B.M.)

 (i) Oxidation state of Fe is +1 and NO exists as ${\mathrm{NO}}^{+}.$

 (ii) The complex ion is in octahedral geometry as attained by ${\mathrm{sp}}^3{\mathrm{d}}^2$ hybridisation.

(iii) The complex is paramagnetic and has three unpaired electrons due to transfer of electron from NO to ${\mathrm{Fe}}^{2+}.$

(iv) The complex is in octahedral geometry as attained by ${\mathrm{d}}^2{\mathrm{sp}}^3$ hybridisation.

 (v) The brown colour of the complex is attributed to d-d transition of electron.

Which of the following statements is most likely to be incorrect ?

Identify the correct order of wavelength of light absorbed for the following complex ions.

${\left[\mathrm{Co}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+ ;}$          ${\left[\mathrm{Co}{\left(\mathrm{CN}\right)}_6\right]}^{3- ;}$             ${\left[\mathrm{Co}{\left(\mathrm{I}\right)}_6\right]}^{3- ;}$               ${\left[\mathrm{Co}{\left(\mathrm{en}\right)}_3\right]}^{3+}$

          I                                      II                                 III                                 IV

CFSE (in octahedral field) will be maximum in  -

(Atomic number Co = 27)

Assertion : tris (ethane-1, 2-diamine) nickel(II) chloride is homoleptic outer orbital complex

Reason : The geometry of Ni in tris (ethane-1, 2-diamine) nickel(II) chloride is trigonal bipyramidal.

Assertion : Bis(dimethylglyoximato)nickel(II) can show geometrical isomerism.

Reason : Tetrahedral complexes with chiral structure exhibit optical isomerism.

Assertion : The magnitude of charge density for a given ligand increases as the charge on the metal

                  ion increases.

Reason : ${\mathrm{NH}}_3$ is a weak field ligand towards ${\mathrm{Co}}^{2+}$ but acts as a strong field ligand towards ${\mathrm{Co}}^{3+}.$