9. CO-ORDINATION COMPOUNDS Objective

9. CO-ORDINATION COMPOUNDS

1. K₂[Fe(CN)₆] is a/an

(A) double salt
(B) complex salt
(C) acid
(D) base

2. Which of the following compounds has tetrahedral geometry ?

(A) [Ni(CN)₄]^2-
(B) [Pd(CN)₄]^2-
(C) [PdCl₄]^2-
(D) (NiCl₄]^2-

3. The number of possible isomers for the complex

[Co(C₂O₄)(NH₃)₂]

(A) 1
(B) 2
(C) 3
(D) 4

4. The oxidation state of nickel in [Ni(CO₄)] is

(A) 1
(B) 4
(C) 2
(D) 3

5. According to Werner’s theory of coordination compounds

(A) Primary valency is ionisable
(B) Secondary valency is ionisable
(C) Primary and secondary valencies are ionisable
(D) Neither primary nor secondary valency is ionisable

6. The 1igand N (CH₂CH₂NH₂) is

(A) bidentate
(B) tridentate
(C) tetradentate
(D) pentadentate

7. Which of the following is a tridentate ligand ?

(A) EDTA^4-
(B) (COO)
(C) dien
(D) NO

8. Among the following which are ambidentate ligands ?

(i) SCN-
(ii) NO
(iii) NO
(iv) C₂O

(A) (i) and (iii)
(B) (i) and (iv)
(C) (ii) and (iii)
(D) (ii) and (iv)

9. Which of the following ligands form a chelate ?

(A) Acetate
(B) Oxalate
(C) Cyanide
(D) Ammonia

10. The correct IUPAC name of the following compound is

[Cr(NH₃)₅(NCS)] [ZnCl₄]

(A) Penta amine isothiocyanato chromium (III) tetrachlorozincate (II)
(B) Penta amine isothicocyanatezinc chloride- chromate (III)
(C) Penta amine isothicoyanato chromate (II)
(D) isothiocyanatopenta amine chromium (II) zinc chloride (IV)

11. Correct formulae of tetraamine chloronitro- platinum (IV) sulphate can be written as

(A) (Pt(NH₃)₄ (ONO) Cl]SO₄
(B) [Pt (NH₃)₄Cl₂NO₂]₂
(C) (Pt(NH₃)₄ (NO₂) Cl]SO₄
(D) (PtCl (ONO)NH₃(SO₄)]

12. Which of the following isomers will give white precipitate with BaCl2 solution ?

(A) (Co(NH₃)₅SO₄]Br
(B) (Co(NH₃)₅Br]SO₄
(C) (Co(NH₃)₄(SO₄)₂]Br
(D) (CO(NH₃)₄(SO₄)]

13. Which of the following compounds exhibits linkage isomerism ?

(A) [Co(en)₃]Cl₃
(B) [Co(NH₃)₆] [Cr(en)₃]
(C) [Co(en)₂(NO₂)Cl]Br
(D) [Co(NH₃)₅Cl] Br₂

14. Which of the following will not show geometrical isomerism ?

(A) [Cr(NH₃)₄Cl₂]Cl
(B) (Co(en)₂Cl₂]Cl
(C) (Co(NH₃)₅NO₂]Cl₂
(D) [Pt(NH₃)₂Cl₂]

15. The hybridisation involved in [Co(C2O4)3]3- is

(A) sp³ d²
(B) sp³ d³
(C) dsp³
(D) d² sp3

16. The lowest value of paramagnetism is shown by

(A) [Co(CN)₆]^3-
(B) [Fe(CN)₆]^3-
(C) [Cr(CN)₆]^3-
(D) [Mn(CN)₆]^3-

17. The magnitude of magnetic moment (spin only) of [NiCl4]2- will be

(A) 2.82 BM
(B) 3.25 BM
(C) 1.23 BM
(D) 5.64 BM

18. Which of the following has largest paramag- netism ?

(A) [Cr(H₂O)₆]³⁺
(B) [Fe(H₂O)₆]²⁺
(C) Cu(H₂O)₆]²⁺
(D) Zn(H₂O)₂]²⁺

19. Indicate the complex ion which shows geometrical isomerism

(A) [Cr(H₂O)₄Cl₂]⁺
(B) (Pt(NH₃)₃Cl]
(C) (Co(NH₃)]₆]³⁺
(D) [Co(CN)₅ (NC)]^3-

20. 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 ?

(A) Thiosulphato
(B) Oxalato
(C) Glycinato
(D) Ethane-1, 2-diamine

21. What kind of isomerism exists between [Cr(H₂O)₆]C1₃ (violet) and [Cr(H₂O)₅C1]Cl₂H₂O (greyish-green) ?

(A) Linkage isomerism
(B) Solvate isomerism
(C) Ionisation isomerism
(D) Coordination isomerism

22. What is the coordination number of Cr in K₃ [Cr(ox)₃]

(A) – 6
(B) 5
(C) 4
(D) 3

23. The EAN of cobalt in the complex ion [Co(en)₂Cl₂] is

(A) – 72
(B) 36
(C) 33
(D) 35

24. Spleter is

(A) Pure zinc
(B) Impure zinc
(C) Impure aluminium
(D) Impure mercury

Class 12th Chemistry Objective Question English