EXERCISE-I (Conceptual Questions)

Amongst the following ions, which one has the highest paramagnetism?

Arrange the following in order of decreasing number of unpaired electrons.

(I) ${\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{2+}$    (II) ${\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]}^{3-}$    (III) ${\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]}^{4-}$   (IV) ${\left[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$

Out of the following which complex will show geometrical isomerism ?

Which of the following is a $\mathrm{\pi }-$acid ligand?

It is an experiment fact that : $\mathrm{DMG}+\mathrm{Ni}\left(\mathrm{II}\right)$ salt $+{\mathrm{NH}}_4\mathrm{OH}⟶$ Red ppt. Which of the following is wrong about this red ppt :

Which of the following complex ions is expected to absorb visible light?

Which of the following carbonyls will have the strongest $\mathrm{C}-\mathrm{O}$ bond?

In which of the following compound $\mathrm{C}-\mathrm{O}$ bond length is maximum :-