The CFSE for octahedral${\left[\mathrm{ \; C}oC{l}_6\right]}^{4-}$ is 18,000 cm${}^{-1}$ . The CFSE for tetrahedral will be ${\left[CoC{l}_4\right]}^{2-}$

1. 6000 cm${}^{-1}$

2. 16,000 cm${}^{-1}$

3. 18,000 cm${}^{-1}$

4. 8,000 cm${}^{-1}$

Due to the presence of ambidentate ligands coordination compounds show isomerism. Palladium complexes of the type $\mathrm{Pd}{( {\mathrm{C}}_6{\mathrm{H}}_5 )}_2(\mathrm{NCS}{)}_2$ and $\left[Pd{\left(C_6{H}_5\right)}_2{\left(SCN\right)}_2\right]$ are

1. Linkage isomers   
2. Coordination isomers
3. Ionization isomers 
4. Geometrical isomers

The compounds [Co(SO${}_4$ (NH${}_3$)${}_5$ ]Br and [Co(SO${}_4$ (NH${}_3$)${}_5$ ]Cl classified as:

1. Linkage isomerism
2. Ionisation isomerism
3. Coordination isomerism
4. No isomerism

Which of the following species is not expected to be a ligand?

1.  NO

2.  NH${}_4^{+}$

3.  NH${}_2$CH${}_2$CH${}_2$NH${}_2$

4.  CO

Which of the following species is not expected to be a ligand?

1. NO

2. NH${}_4^{+}$

3. ${\mathrm{NH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{NH}}_2$

4. CO

What kind of isomerism exists between [Cr(H₂O)₆]Cl₃(violet) and [Cr(H₂O)₅Cl]Cl₂⋅H₂O (greyish-green)?

1. Linkage isomerism

2. Solvate isomerism

3. lonisation isomerism

4. Coordination isomerism

IUPAC name of $\left[\mathrm{Pt}{\left({\mathrm{NH}}_3\right)}_2\mathrm{Cl}\right({\mathrm{NO}}_2\left)\right]$ is-

1. Platinum diaminechloronitrite

2. Chloronitrito-N-ammineplatinum (ll)

3. Diamminechloridonitrito-N-platinum (ll)

4. Diamminechloronitrito-N-platinate (ll)

Atomic number of Mn Fe and Co are 25, 26 and 27 respectively. Which of the following inner orbital octahedral complex ions are diamagnetic?

a. ${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$

b. ${\left[\mathrm{Mn}{\left(\mathrm{CN}\right)}_6\right]}^{3-}$

c.  ${\left[Fe{\left(CN\right)}_6\right]}^{4-}$

d.  ${\left[\mathrm{Fe}{\left(CN\right)}_6\right]}^{3-}$

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)

Identify the outer orbital octahedral complexes among the following that have the same number of unpaired electrons:
(Atomic numbers of Mn, Fe, Co, and Ni are 25, 26, 27, and 28 respectively)

$\left(\mathrm{a}\right) {\left[{\mathrm{MnCl}}_6\right]}^{3-}$
$\left(\mathrm{b}\right) {\left[{\mathrm{FeF}}_6\right]}^{3-}$
$\left(\mathrm{c}\right) {\left[{\mathrm{CoF}}_6\right]}^{3-}$
$\left(\mathrm{d}\right) {\left[\mathrm{Ni}{\left({\mathrm{NH}}_3\right)}_6\right]}^{2+}$

1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)

Which of the follwing options are correct for ${\left[Fe{\left(CN\right)}_6\right]}^{3-}$ is 

a.  $d^{2}s{p}^3$ hybridisation 

b.  $d^{2}s{p}^2$ hybridisation 

c.  Paramagnetic 

d.  Diamagnetic

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)