A magnetic moment of 1.73 BM will be shown by which one of the following:

1. [Ni(CN)₄]^2–
2. TiCl₄
3. [CoCl₆]^4–
4. [Cu(NH₃)₄]²⁺

Which one of the following is an outer orbital complex and exhibits paramagnetic behavior?

1. $\left[Ni\right(N{H}_3{)}_6{]}^{2+}$

2. $\left[Zn\right(N{H}_3{)}_6{]}^{2+}$

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

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

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⁺

Of the following complex ions, which is diamagnetic in nature?

1.  ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$

2.  ${\left[{\mathrm{CuCl}}_4\right]}^{2-}$

3.  ${\left[{\mathrm{CoF}}_6\right]}^{3-}$

4.  ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$

The complexes [Co(NH₃)₆][Cr(CN)₆] and [Cr(NH₃)₆][Co(CN)₆] show:

1. Ionisation isomerism

2. Co-ordination isomerism

3. Geometrical isomerism

4. Linkage isomerism

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

The  complex ion that does not expected to absorb visible light is:

1. $\left[Ni\right(CN{)}_4{]}^{\mathrm{2-}}$

2. $\left[Cr\right(N{H}_3{)}_6{]}^{3+}$

3. $\left[Fe\right(H_{2}O{)}_6{]}^{2+}$

4. $\left[Ni\right(H_{2}O{)}_6{]}^{2+}$

The existence of two different coloured complexes with the composition of [Co(NH₃)₄Cl₂]⁺is due to:

1. Linkage isomerism

2. Geometrical isomerism

3. Coordination isomerism

4. Ionisation isomerism

Which of the following ions doesn't exhibit optical isomerism?

(en = ethylenediamine)

1. [Co(en)₂Cl₂]⁺

2. [Co(NH₃)₃Cl₃]

3. [Co(en)Cl₂(NH₃)₂]⁺

4. [Co(en)₃]³⁺