Question No:1

The charge on Iron in [Fe(CN)₆]^3–is

[A] –6
[B] 3
[C] – 3
[D] 6



Question No:2

Co-ordination number of Coin [CoF₆]^–3is

[A] 4
[B] 5
[C] 6
[D] 8



Question No:3

The neutral ligand is

[A] Chloro
[B] Hydroxo
[C] Ammine
[D] Oxalato



Question No:4

H₂N–CH₂–CH₂–NH₂serves as :

[A] A) Monodentate ligand
[B] Chelating ligand
[C] Bridging ligand
[D] Cationic ligand



Question No:5

In the complex ion [Fe(EDTA)]^–the coordination number and oxidation state of central metal ion is :-

[A] C.N.=6 O.N.= +3
[B] C.N.=1 O.N.= –1
[C] C.N.=4 O.N.=+2
[D] C.N.=3 O.N.=+3



Question No:6

Which one of the following is not a condition for complex salt formation :-

[A] Small size
[B] Higher nuclear charge
[C] Availability of vacant d-orbitals
[D] Variable oxidation states



Question No:7

AgCl precipitate dissolves in NH₃due to the formation of :-

[A] [Ag(NH₄)₂]OH
[B] [Ag(NH₄)₂]Cl
[C] [Ag(NH₃)₂]Cl
[D] [Ag(NH₃)₂]OH



Question No:8

The coordination number and oxidation number of the central metal ion in the complex [Pt(en) ₂]⁺² is :-

[A] C.N.= 2,O.N.=+2
[B] C.N.= 6,O.N.=+4
[C] C.N.= 4,O.N.=+4
[D] C.N.= 4,O.N.=+2



Question No:9

Which one of the following is not a complex compound ?

[A] [Cu(NH₃)₄]SO₄H₂O
[B] K₂[PtCl₆]
[C] K₂SO₄.Al₂(SO₄)₃.24H₂O
[D] [Co(NH₃)₆]Cl₃



Question No:10

The addition compounds, which retain their indentity in solution are called.

[A] Double salts
[B] Complex compounds
[C] Coordination compounds
[D] (B) and(C) both



Question No:11

The total number of Ligands attached to the central metal ion through coordination(sigma) bond is called.

[A] Valency of the metal ion
[B] Oxidation state of the metal ion
[C] Coordination number of metal ion
[D] None of the above



Question No:12

Select bidentate or didentate ligand from the following.

[A] CO
[B] SCN^–
[C] CH₃COO^–
[D] D) C₂O₄^2-



Question No:13

The oxidation state of Ag in Tollen’s reagent is –

[A] 0
[B] 1
[C] 1.5
[D] 2



Question No:14

The co-ordination number of a metal in co-ordination compound is

[A] Same as primary valency
[B] Sum of primary and secondary valencies
[C] Same as secondary valency
[D] None of the above



Question No:15

For a stable complex, the value of ionic potential [ ionic charge/ ionic radius] must be.

[A] Small
[B] Large
[C] Zero
[D] None of these