The type of isomerism shown by the complex [CoCl₂(en)₂]⁺ is:

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

The sum of the coordination number and oxidation number of the metal M in the complex [M(en)₂(C₂O₄)]Cl is:

An ion, among the following, that has a magnetic moment of 2.84 BM is:
(At. no. Ni = 28, Ti = 22, Cr = 24, Co = 27)

1. Ni²⁺
2. Ti³⁺
3. Cr²⁺
4. Co²⁺

Cobalt(III) chloride forms several octahedral complexes with ammonia.
A compound among the following that does not give a test for chloride ions with silver nitrate at 25 °C is:

The d-electron configurations of Cr²⁺, Mn²⁺, Fe²⁺ and Co²⁺ are d⁴, d⁵, d⁶, and d⁷ respectively. Minimum paramagnetic behavior is shown by:
(At. No C = 24, Mn = 25, Fe = 26, Co = 27)

1. [Fe(H₂O)₆]²⁺

2. [Co(H₂O)₆]²⁺

3. [Cr(H₂O)₆]²⁺

4. [Mn(H₂O)₆]²⁺

The number of geometrical isomers shown by $\left[\mathrm{Pt}\left(\mathrm{Py}\right)\left({\mathrm{NH}}_3\right)\mathrm{BrCl}\right]$ are:

A complex  ion among the following can absorb visible light is:
(At. no. Zn = 30, Sc = 21, Ti = 22, Cr = 24)

1. [Sc(H₂O)₃(NH₃)₃]³⁺

2. [Ti(en)₂ (NH₃)₂]⁴⁺

3. [Cr(NH₃)₆]³⁺

4. [Zn(NH₃)₆]²⁺

Which of the following complexes has the highest paramagnetic behaviour?

(where gly = glycine, en = ethylenediamine, ox = oxalate ion and bpy = bipyridyl moieties )
(At no : Ti= 22, V = 23, Fe = 26, Co = 27)

1. [V(gly)₂(OH)₂(NH₃)₂]⁺

2. [Fe(en)(bpy)(NH₃)₂]²⁺

3.  [Co(ox)₂(OH)₂]^-

4. [Ti(NH₃)₆]³⁺

The compound that gives a pair of enantiomorphs is:
(en = NH₂ CH₂CH₂ NH₂)

1. $\left[Co\right(N{H}_3{)}_{4}C{l}_2]N{O}_2$

2. $\left[Cr\right(N{H}_3{)}_6\left]\right[Co\left(CN{)}_6\right]$

3. $\left[Co\right(en{)}_{2}C{l}_2]Cl$

4. $\left[Pt\right(N{H}_3{)}_4\left]\right[PtC{l}_6]$