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)

An aqueous pink solution of cobalt(II) chloride changes to deep blue on addition of excess of HCl. This is because ........

a. ${\left[\mathrm{Co}\left({\mathrm{H}}_2{\mathrm{O}}_6\right)\right]}^{2+}$ is transformed into ${\left[{\mathrm{CoCl}}_6\right]}^{4-}$

b. ${\left[\mathrm{Co}\left({\mathrm{H}}_2{\mathrm{O}}_6\right)\right]}^{2+}$ is transformed into \(CoCl^{2-}_4\)
c. Tetrahedral complexes have smaller crystal field splitting than octahedral complexes.
d. Tetrahedral complexes have larger crystal field splitting than octahedral complex 

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

Which of the following complex is/are homoleptic:

a. \( {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}} \)
b. \( {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right]^{2+}} \)
c. \( {\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}}\)
d. \(\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]\)
Choose the correct option.
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)

Which of the following complexes is/are heteroleptic?

(a) ${\left[Co{\left(N{H}_3\right)}_6\right]}^{3+}$

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

Identify the correct statements for the behaviour of ethane -1, 2- diamine as a ligand.

(a) It is a neutral ligand

(b) It is a didentate ligand

(c) It is a chelating ligand

(d) It is a unidentate ligand

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

Which of the following complexes show linkage isomerism?

$\left(\mathrm{a}\right)\hspace{0.17em}{\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left({\mathrm{NO}}_2\right)\right]}^{2+}$
$\left(\mathrm{b}\right) [\mathrm{Co}{\left({\mathrm{H}}_2\mathrm{O}\right)}_5\mathrm{CO}{]}^{3+}$
$\left(\mathrm{c}\right) [\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_5\mathrm{SCN}{]}^{2+}$
$\left(\mathrm{d}\right) {\left[\mathrm{Fe}{\left(\mathrm{en}\right)}_2{\mathrm{Cl}}_2\right]}^{+}$

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

Match the complex ions give in Column I with the colours given in column II and assign the correct code.

Codes

Match the coordination given in Column I with the central metal atoms given in Column II and assign the correct code.

Codes
 

 Match the complex ions given in Column I with the hybridization and number of unpaired electrons given in Column II and assign the correct code. 

Codes