The most stable complex among the following species is:

1.  $\left[\mathrm{Fe}{\left(\mathrm{CO}\right)}_5\right]$

2.  $[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6{]}^{3-}$

3.  $[\mathrm{Fe}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_3{]}^{3-}$

4.  $[\mathrm{Fe}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6{]}^{3+}$

A chelating agent has two or more than two donor atoms to bind to a single metal ion. Which of the following is not a chelating agent?

1. Thiosulphato

2. Oxalato

3. Glycinato

4. Ethane-1,2-diamine

What kind of isomerism exists between $\left[\mathrm{Cr}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]C{l}_3$ (violet) and $\left[\mathrm{Cr}{\left({\mathrm{H}}_{\mathrm{2}}\mathrm{O}\right)}_{5}Cl\right]C{l}_2.H_{2}O$ (greyish-green)?

1.  Linkage isomerism

2.  Solvate isomerism

3.  Ionization isomerism

4.  Coordination isomerism

IUPAC name of $\left[\mathrm{Pt}{\left({\mathrm{NH}}_3\right)}_2\mathrm{Cl}\left({\mathrm{NO}}_2\right)\right]$ is :

1.  Platinum diaminechloronitrite

2.  Chloronitrito-N-ammineplatinum (II)

3.  Diamminechloridonitrito-N-platinum (II)

4.  Diamminechloronitrito-N-platinate (II)

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

Match the complexions given in Column I with the hybridization and number of unpaired electrons given in Column II and assign the correct code :

1.  A (3) B (1) C (5) D (2)

2.  A (4) B (3) C (2) D (1)

3.  A (3) B (2) C (4) D (1)

4.  A (4) B (1) C (2) D (3)

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 :

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?