What is the correct electronic configuration of the central atom in \(K_{4}FeCN_{6}\) based on crystal field theory:

1.	\(e^{4}   t_{2 g}^{    2}\)	2.	\(t_{2 g}^{    4}   e_{g}^{2}\)
3.	\(t_{2 g}^{    6}   e_{g}^{0}\)	4.	\(e^{3}   t_{2 g}^{  3}\)

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

An anticancer agent among the following is:

An ion that has magnetic moment 2.83 BM is:
(Atomic Number: Ti=22, Cr=24, Mn=25, Ni=28)

1. $T{i}^{3+}$

2. $N{i}^{2+}$

3. $C{r}^{3+}$

4. $M{n}^{2+}$

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:

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⁺

The IUPAC name of complex ion, [Fe(CN)₆]^3- is:

1. Hexacyanoiron(III) ion

2. Hexacyanitoferrate(III) ion

3. Tricynoferrate(III) ion

4. Hexacyanidoferrate(III) ion

The hybridization involved in the complex ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$is:
(Atomic number of Ni=28)

The low spin complex among the following is:

Iron carbonyl, $\mathrm{Fe}{\left(\mathrm{CO}\right)}_5$, is classified as: