The correct representation of tetrahydroxidozincate (II) is:
1. \([Zn(OH)_4]^{2-}\)
2. \([Zn(OH)_4]^{-}\)
3. \([Zn(OH)_4]^{3-}\)
4. \([Zn(OH)_4]\)

$1.$ ${\mathrm{K}}_2\left[\mathrm{Cr}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_3\right]$
$2.$ ${\mathrm{K}}_3\left[\mathrm{Cr}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_3\right]$
$3.$ ${\mathrm{K}}_3\left[\mathrm{Cr}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_2\right]$
$4.$ ${\mathrm{K}}_2\left[\mathrm{Cr}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_4\right]$

The correct representation of pentaamminenitrito-O-cobalt(III) is :

$1.<mspace\; width="1em"></mspace>{\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left(\mathrm{ONO}\right)\right]}^{3+}$
$2.<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>{\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left(\mathrm{ONO}\right)\right]}^{2+}$
$3.<mspace\; width="1em"></mspace>{\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left(\mathrm{ONO}\right)\right]}^{2-}$
$4.<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>{\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left(\mathrm{ONO}\right)\right]}^{3-}$

The correct representation of potassium tetracyanidonickelate(II) is :

$1.<mspace\; width="1em"></mspace>{\mathrm{K}}_3\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]$
$2.<mspace\; width="1em"></mspace>\mathrm{K}\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]$
$3.<mspace\; width="1em"></mspace>{\mathrm{K}}_2\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]$
$4.<mspace\; width="1em"></mspace>{\mathrm{K}}_2\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_5\right]$

The correct splitting diagram of d orbitals in an octahedral crystal field is:

1.		2.
3.		4.	None of these.

The ligand(s)that show a chelating effect is/are:

Which of the following statements is incorrect?

Optical isomerism is exhibited by among the following is/are:

The incorrect statement among the following is:

The correct statement(s) among the following options is/are :

1. Complexes in which the metal ion is bound to only one kind of a donor group are homoleptic complexes.

2. Heteroleptic complexes are those complexes where the central metal ion is bound to only one type of donor group.

3. $[\mathrm{Pt}{\left(\mathrm{Cl}\right)}_4{]}^{2-}$ is an example of a homoleptic complex.

4. Both (1) and (3)