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)

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

Which of the following 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:

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

Choose the correct option:
1. a and b
2. b and c
3. c and d
4. a and c

Which of the following complex is/are homoleptic:

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

Which of the following complexes is/are heteroleptic?

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?
(a) $\hspace{0.17em}{\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left({\mathrm{NO}}_2\right)\right]}^{2+}$
(b)$<mspace\; width="1em"></mspace>[\mathrm{Co}{\left({\mathrm{H}}_2\mathrm{O}\right)}_5\mathrm{CO}{]}^{3+}<mspace\; width="1em"></mspace>$
(c) $<mspace\; width="1em"></mspace>[\mathrm{Cr}{\left({\mathrm{NH}}_3\right)}_5\mathrm{SCN}{]}^{2+}$
(d)$<mspace\; width="1em"></mspace>{\left[\mathrm{Fe}{\left(\mathrm{en}\right)}_2{\mathrm{Cl}}_2\right]}^{+}$

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