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

1. [Co(gly)₃]                            

2. [Ni(DMG)₂]

3. cis-[Cu(gly)₂]                              

4. [Zn(en)(gly)]⁺

Which of the following compound shows optical isomerism?

(1) cis-$\left[{\mathrm{CrCl}}_3\right({\mathrm{NH}}_3{)}_3]$                         

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

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

(4) trans-$\left[\mathrm{Co}\right(\mathrm{en}{)}_2{\mathrm{Cl}}_2{]}^{+}$

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)                              

(1)    C       A         D          B                     

(2)    D       C         A          B

(3)    D       C         B          A                     

(4)    D        A         C         B 

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 :

(1) (a) only 

(2) (a) and (c) only

(3) (c) only

(4) (b) and (c) only

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?

(1) Diammineethylenediaminedithiocyanato$-$S-platinum (II)

(2) Diammineethylenediaminedithiocyanato$-$S-platinate (IV) ion.

(3) Diammineethylenediaminedithiocyanato$-$S-platinum (IV) ion.

(4) Diamminebis (ethylenediamine) dithiocyanato$-$S-platinum (IV) ion.

Incorrect match among the following is:

The EAN of metal atoms in $\left[\mathrm{Fe}{\left(\mathrm{CO}\right)}_2{\left({\mathrm{NO}}^{+}\right)}_2\right]<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\left(\mathrm{Co}\right)}_2{{\left(\mathrm{CO}\right)}_8}_{}$ respectively are :

1. 34, 35 

2. 34, 36

3. 36, 36                                       

4. 36, 35

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.

$<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{a}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{b}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{c}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{d}$
$\left(1\right)<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{r}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{s}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{p}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{q}$
$\left(2\right)<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{s}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{r}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{q}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{p}$
$\left(3\right)<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{r}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{s}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{q}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{p}$
$\left(4\right)<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{p}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{q}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{r}<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>\mathrm{s}$

Which of the following statements is correct?

(A) ${\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}<mspace\; width="1em"></mspace>\left(\mathrm{aq}\right)<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>{\left[\mathrm{Cr}{\left(\mathrm{CN}\right)}_6^{}\right]}^{4-}<mspace\; width="1em"></mspace>\left(\mathrm{aq}\right)$ 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.