Note: In the following questions match the items given in Columns I and II.

Match the complex species given in Column I with the possible isomerism given in Column II and assign the correct code :

	Column I (Complex species)		Column II (Isomerism)
A.	${\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_4{\mathrm{Cl}}_2\right]}^{+}$	1.	optical
B.	$\mathrm{cis}-{\left[\mathrm{Co}{\left(\mathrm{en}\right)}_2{\mathrm{Cl}}_2\right]}^{+}$	2.	ionisation
C.	$\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\left({\mathrm{NO}}_2\right)\right]C{l}_2$	3.	coordination
D.	$\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_6\right]\left[Cr{\left(CN\right)}_6\right]$	4.	geometrical
		5.	linkage

1.  A (1) B (2) C (4) D (5)

2.  A (4) B (3) C (2) D (1)

3.  A (4) B (1) C (5) D (3)

4.  A (4) B (1) C (2) D (3)

Match the compounds given in Column I with the oxidation state of cobalt present in it (given in Column II) and assign the correct code.

1. A=(1), B=(2), C=(4), D=(5)

2. A=(4), B=(3), C=(2), D=(1)

3. A=(5), B=(1), C=(4), D=(2)

4. A=(4), B=(1), C=(2), D=(3)

The hybridised state of Cu in [Cu(NH₃ )₄ ]²⁺ is

1. sp

2. sp²

3. sp³

4. dsp²

How many hydrate isomers are possible for the molecular formula ${\mathrm{CoCl}}_3·6{\mathrm{H}}_2\mathrm{O}$?

1. One

2. Two

3. Three

4. Four

If excess of AgNO₃ solution is added to 100ml of 0.024M solution of dichlorobis(ethylene diamine) cobalt (III) Chloride, how many moles of AgCl will be precipitated?

The shape of  [NiCl₄]^2-  and  [PtCl₄]^2- respectively are

Which of the following compounds exhibit geometrical isomerism?

$\mathrm{\pi }$ bonding is not involved in

1. Ferrocene

2. Dibenzene Chromium

3. Zeise’s Salt

4. Grignard Feagent

The co-ordination number of Fe in Ferrocene is

1. 2

2. 5

3. 6

4. 10

[Fe(H₂O)₆]³⁺ and [Fe(CN)₆]^3- differ in:

1. Magnetic nature

2. Oxidation number

3. Co-ordination number

4. Structure