Match Column-I with Column-II and mark the correct option.

	Column-I (Ligand Name)		Column-II (Type of Ligand)
i.	${\mathrm{NO}}_2^{-}$	a.	Hexadenate
ii.	${\mathrm{OH}}^{-}$	b.	Didentate
iii.	${\mathrm{C}}_2{\mathrm{O}}_4^{2-}$	c.	Monodentate
iv.	EDTA	d.	Ambidentate

Codes:
1. i=d, ii=c, iii=b, iv=a

2. i=c, ii=d, iii=b, iv=a

3. i=c, ii=d, iii=a, iv=b

4. i=a, ii=c, iii=b, iv=d

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 :

$1. {\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left(\mathrm{ONO}\right)\right]}^{3+}$
$2. {\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left(\mathrm{ONO}\right)\right]}^{2+}$
$3. {\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left(\mathrm{ONO}\right)\right]}^{2-}$
$4. {\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left(\mathrm{ONO}\right)\right]}^{3-}$

The correct representation of potassium tetracyanidonickelate(II) is :

$1. {\mathrm{K}}_3\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]$
$2. \mathrm{K}\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]$
$3. {\mathrm{K}}_2\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]$
$4. {\mathrm{K}}_2\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_5\right]$

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:

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

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

The incorrect statement(s) among the following option is/are-

1. In a coordination entity, the central atom or ion is surrounded by a suitable number of neutral molecules or negative ions ( called ligands). 

2. Coordination number is also referred as ligancy.

3. Coordination polyhedrons is the spatial arrangement of the ligands that are directly attached to the central metal ion in the coordination sphere.

4. None of these.