Among i. [Co(NH₃)₆]CI₃ , ii. [Ni(NH₃)₆]CI₂ , iii. Cr(H₂O)₆]CI₃ , iv. [Fe(H₂O)₆]CI₂, the diamagnetic complex is-

1. i

2. ii

3. iii

4. iv

For which of the following complexes IUPAC names is not correctly assigned?

1.  $\mathrm{Na}\left[\mathrm{Pt}\left({\mathrm{NH}}_3\right)\mathrm{BrCl}\left({\mathrm{NO}}_2\right)\right]$-Sodium amminebromidochlorido nitrito-N-pIatinate(II)

2.  $\left[{\mathrm{CuCl}}_2{\left(\mathrm{O} = \mathrm{C}{\left({\mathrm{NH}}_2\right)}_2\right)}_2\right]$-Dichlorobis (dicarboxido tetraamine) copper (II)

3.   ${\left[{\mathrm{PtCl}}_3\left({\mathrm{\eta }}^2 - {\mathrm{C}}_2{\mathrm{H}}_4\right)\right]}^{-}$ —Trichlorido (${\mathrm{\eta }}^2$ — ethylene) platinate(ll) ion

4.  ${\left[\mathrm{Fe}\left(\mathrm{Cl}\right){\left(\mathrm{CN}\right)}_4\left({\mathrm{O}}_2\right)\right]}^{4-}$—Chloridotetracynosuperoxoferrate (II) ion

The Crystal Field Stabilization Energy (CFSE) and the spin-only magnetic moment in Bohr Magneton (BM) for the complex ${\mathrm{K}}_3\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]$ are, respectively,

1.  $0.0{∆}_0 \mathrm{and} \sqrt{35} \mathrm{BM}$

2.  $-2.0{∆}_0 \mathrm{and} \sqrt{3} \mathrm{BM}$

3.  $-0.4{∆}_0 \mathrm{and} \sqrt{24} \mathrm{BM}$

4.  $-2.4{∆}_0 \mathrm{and} \sqrt{0} \mathrm{BM}$

${\mathrm{Zn}}^{2+} + 4{\mathrm{NH}}_3 \rightleftharpoons {\left[\mathrm{Zn}{\left({\mathrm{NH}}_3\right)}_4\right]}^{2+}$. the concentration of free ${\mathrm{Zn}}^{2+}$ ions in a solution of the complex ion ${\left[\mathrm{Zn}{\left({\mathrm{NH}}_3\right)}_4\right]}^{2+}$ can be increased significantly by the addition of

1.  ${\mathrm{H}}_2\mathrm{O}$

2.  HCl(aq)

3.  ${\mathrm{NH}}_3\left(\mathrm{aq}\right)$

4.  ${\mathrm{NH}}_4\mathrm{Cl}\left(\mathrm{aq}\right)$

Other than the X-ray diffractions, how could be the following pairs of isomers be distinguished from one another by;

$\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_6\right] \left[\mathrm{Cr}{\left({\mathrm{NO}}_2\right)}_6\right] \mathrm{and}$$\left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_4{\left({\mathrm{NO}}_2\right)}_2\right] \left[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_2{\left({\mathrm{NO}}_2\right)}_4\right]$
1.  Cryoscopic method

2.  Measurement of molar conductance

3.  Measuring magnetic moments

4.  Observing their colors

The hybridizations of [Ni(CO)₄] and [Cr(H₂O)₆]³⁺, respectively, are : 

1. sp³ and d³sp²

2. dsp² and d²sp³

3. sp³ and d²sp³

4. dsp²  and sp³d²

Which of the following is true about the complex $\left[{\mathrm{PtCl}}_2\left({\mathrm{NH}}_3\right){\left({\mathrm{OH}}_2\right)}_{}\right]$; [Atomic number of Pt = 78]

I.  It will have two geometrical isomeric forms, cis and trans

II.  The hybridization state of Pt(ll) is ${\mathrm{sp}}^3$

III.  It is a square planar complex

IV.  It is a diamagnetic complex

V.  It can show hydrate isomerism

VI.  It is a tetrahedral complex

1.  I, III, IV

2.  II, IV, V

3.  II, V, IV

4.  I, V, IV

Amongst $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$, ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ and [NiCl₄]^2- :

1.  $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$ and ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$ are diamagnetic and ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ is paramagnetic.

2.  ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$ and ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ are diamagnetic and $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$ is paramagnetic.

3.  $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$ and ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ are diamagnetic and ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$ is paramagnetic.

4.  $\mathrm{Ni}{\left(\mathrm{CO}\right)}_4$ is diamagnetic and ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$ and ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ are paramagnetic.

Which of the following statements is correct?

1.  a & c only

2.  b & c only

3.  a & b only

4. All of these

The correct electronic configuration for the complex [Ni(NH₃)₆]²⁺ is:

1. ${\mathrm{t}}_{2\mathrm{g}}^4 {\mathrm{e}}_{\mathrm{g}}^2$

2. ${\mathrm{t}}_{2\mathrm{g}}^6 {\mathrm{e}}_{\mathrm{g}}^2$

3. ${\mathrm{t}}_{2\mathrm{g}}^7 {\mathrm{e}}_{\mathrm{g}}^1$

4. ${\mathrm{t}}_{2\mathrm{g}}^4 {\mathrm{e}}_{\mathrm{g}}^4$