Which one of the following is a tridentate ligand? 

1

(a)

NO^-₂

(b)

oxalate ion

(c)

glycinate ion

(d)

dien

IUPAC  name of [Pt(NH₃)₃Br(NO₂)Cl]Cl is 

1

(a)

Triamminechloridobromidonitroplatinum (IV) chloride

(b)

Triamminebromidonitrochloridoplatinum (IV) chloride

 

(c)

Triamminebromidochloridonitroplatinum (IV) chloride

(d)

Triamminenitrochloridobromidoplatinum (IV) chloride

Amongst the following ions which one has the highest paramagnetism? 

1

(a)

[Cr(H₂O)₆]³⁺

(b)

[Fe(H₂O)₆]²⁺

(c)

[Cu(H₂O)₆]²⁺

(d)

[Zn(H₂O)₆]²⁺

The most stable complex among the following is 

1

(a)

K₃[Al(C₂O₄)₃]

(b)

[Pt(en)₂] Cl₂

(c)

[Ag(NH₃)₂] Cl

(d)

K₂[Ni(EDTA)]

When 0.01 mole of a cobalt complex is treated with excess silver nitrate solution, 4.305 g silver chloride is precipitated. The formula of the complex is

1

(a)

[Co(NH₃)₃Cl₃]

(b)

[Co(NH₃)₅Cl]Cl₂

(c)

[Co(NH₃)₆]Cl₃

(d)

[Co(NH₃)₄Cl₂]NO₃

(e)

[Co(NH₃)₄Cl₂]Cl

The correct statement with respect to the complexes Ni(CO)₄ and [Ni(CN)₄]^2- is

1

(a)

nickel is in the same oxidation state in both

(b)

both have tetrahedral geometry

(c)

have square planar and tetrahedral geometry respectively

(d)

have tetrahedral and square planar geometry respectively

(e)

UnAvailable Option

Which of the following complex exhibits the highest paramagnetic behaviour?

1

(a)

[V(gly)₂(OH)₂(NH₃)₂]⁺

(b)

[Fe(en)(bpy)(NH₃)₂]²⁺

(c)

[Co(OX)₂(OH)₂]^2-

(d)

[Ti(NH₃)₆]³⁺

Among the following complexes (K-P) K₃[Fe(CN)₆] (K), [Co(NH₃)₆]Cl₃ (L), Na₃[Co(oxalate)₃](M), [Ni(H₂O)₆]Cl₂ (N), K₂[Pt(CN)₄] (O) and [Zn(H₂O)₆] (NO₃)₂ (P) the diamagnetic complexes are

1

(a)

K, L, M, N

(b)

K, M, O, P

(c)

L, M, O, P

(d)

L, M, N, O

[Cr(H₂O)₆]Cl₃ (at.no. of Cr = 24) has a magnetic moment of 3.83 B.M. The correct distribution of 3d electrons in the chromium of the complex is

1

(a)

\({ 3d }_{ xy }^{ 1 },{ 3d }_{ yz }^{ 1 },{ 3d }_{ xz }^{ 1 }\)

(b)

\({ 3d }_{ xy }^{ 1 },{ 3d }_{ yz }^{ 1 },{ 3d }_{ z ^2}^{ 1 }\)

(c)

\({ 3d }_{ (x^2-y^2)}^{ 1 },{ 3d }_{ z^2 }^{ 1 },{ 3d }_{ xz }^{ 1 }\)

(d)

\({ 3d }_{ xy}^{ 1 },{ 3d }_{ (x^2-y^2) }^{ 1 },{ 3d }_{ yz }^{ 1 }\)

The value of n in the carbonyl \({ \left( CO \right) }_{ n }-Co-Co-(Co)_n\) is

1

(a)

4

(b)

5

(c)

6

(d)

8

Write IUPAC name of K₃[Fe(C₂O₄)₃].

1

(a)

Potassium trioxalatoferrate (III).

Arrange the following complex in the increasing order of conductivity of their solution:
\(\left[ Co\left( { NH }_{ 3 } \right) _{ 3 }Cl_{ 3 } \right] ,\left[ Co\left( { NH }_{ 3 } \right) _{ 4 }Cl_{ 2 } \right] Cl,\left[ Co\left( { NH }_{ 3 } \right) _{ 6 } \right] Cl_{ 3 },\left[ Co\left( { NH }_{ 3 } \right) _{ 5 }Cl \right] Cl_{ 2 }\)

1

(a)

\(\left[ Co\left( { NH }_{ 3 } \right) _{ 3 }Cl_{ 3 } \right] \) < \(\left[ Co\left( { NH }_{ 3 } \right) _{ 4 }Cl_{ 2 } \right] Cl\) < \(\left[ Co\left( { NH }_{ 3 } \right) _{ 5 }Cl \right] Cl_{ 2 }\) < \(\left[ Co\left( { NH }_{ 3 } \right) _{ 6 } \right] Cl_{ 3 }\).
Greater the number of ions, more will be conductivity.

In a tetrahedral crystal field, the d-orbitals split into ................ orbitals collectively called ............. and ............. orbitals collectively called ..............

1

(a)

d_x²-y² and d_z², e and d_xy, d_yz and d_xz, t₂

What type of isomerism is shown by the following complexes ?
(i) \([Cr(en)_3]^{3+}\)     
(ii) \([Pt(NH_3)_4]\ [PtCl_4]\)

\(\)

1

(a)

(i) Optical isomerism    
(ii) Coordination isomerism (because some Cl and NH₃ ligands may interchange, e.g., \([Pt(NH_3)_3\ Cl]\ [Pt(NH_3)\ Cl_3].\)

What is crystal field splitting energy (CFSE) ?

1

(a)

The dfference of energy between two sets of d-orbitals after splitting is called crystal field splitting energy or crystal field stabilization energy (CFSE).

What do you understand by stepwise stability constant and overall stability constant of a coordination compound? How are these two constants related?

4

(a)

(i) What is the basis of formation of the spectrochemical series?
(ii) Draw the structures of geometrical isomers of the following coordination complexes: [Co(NH₃)₃Cl₃] and [CoCl₂)(en₂)]⁺
(where en = ethylene diamine and atomic no. of Co is 27).

4

(a)