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

1. $ds{p}^2$

2. $s{p}^3$

3. $d^{2}s{p}^2$

4. $d^{2}s{p}^3$

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

1. 9

2. 6

3. 7

4. 8

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

An ion, among the following, that has 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:

1. CoCl₃. 3NH₃

2. CoCl₃. 4NH₃

3. CoCl₃. 5NH₃

4. CoCl₃. 6NH₃

The correct statement, among the following, is:

1. [Co(CN)₆]^3- has no unpaired electrons and will be in a low-spin configuration.

2. [Co(CN)₆]^3- has four unpaired electrons and will be in a low-spin configuration.

3. [Co(CN)₆]^3- has four unpaired electrons and will be in a high-spin configuration.

4. [Co(CN)₆]^3- has no unpaired electrons and will be in a high-spin configuration.

Among the following complexes the one which shows zero crystal field stabilization energy (CFSE) is

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

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

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

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

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. $M{n}^{2+}$

An anticancer agent among the following is-

1. $\mathrm{mer}-\left[\mathrm{Co}\right({\mathrm{NH}}_3{)}_3\mathrm{Cl}]$

2. c$\mathrm{is}-\left[{\mathrm{PtCl}}_2\right({\mathrm{NH}}_3{)}_2]$

3. c$\mathrm{is}-{\mathrm{K}}_2[\mathrm{Pt} {\mathrm{Cl}}_2{\mathrm{Br}}_2]$

4. ${\mathrm{NH}}_2{\mathrm{CoCl}}_4$