A compound among the following has both fac-mer and optical isomers is:

1. [Co(NH₃)₅(NO₃)]     

2. [Co(en)₃]³⁻

3. [Co(gly)₃]

4. None of the above

Consider the following complex ions P, Q and R,

P = ${\left[{\mathrm{FeF}}_6\right]}^{3-}$

Q = ${\left[\mathrm{V}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$

and R= ${\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$

The correct order of the complex ions, according to their spin-only magnetic moment values (in B.M.) is:

1. R<Q<P

2. Q<R<P

3. R<P<Q

4. Q<P<R

In the context of biological systems, coordination compounds play a crucial role;
identify the incorrect statement from the provided options.

For octahedral complex, the value of the 'spin only' magnetic moment for one of the following configuration is 2.84 BM. The correct one is:

1. d⁴ (in strong ligand field)

2. d⁴ (in weak ligand field)

3. d³ (in weak as well as in strong field)

4. d⁵ (in strong ligand field)

The correct order of the stoichiometries of AgCl formed when AgNO₃ in excess is treated with the complexes
CoCl₃.6NH₃, CoCl₃.5NH₃, CoCl₃.4NH₃ respectively is:

1. 3AgCl, 1AgCl, 2AgCl

2. 3AgCl, 2AgCl, 1AgCl

3. 2AgCl, 3AgCl, 1AgCl

4. 1AgCl, 3AgCl, 2AgCl

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

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 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 complex that is used as an anticancer agent is:

1. mer-[Co(NH₃)₃Cl₃         

2. cis-[PtCl₂(NH₃)₂]

3. cis-K₂[PtCl₂ Br₂]           

4. Na₂CoCl₄