CBSE Class 12 Chemistry Coordination Compounds Notes Set F

 CO-ORDINATION COMPOUNDS 

VSA QUESTIONS (1 - MARK QUESTIONS)

1. Define the term coordination compound?

2. Write the names of counter ions in

(i) Hg [Co (SCN)₄] and     (ii) [Pt(NH₃)₄] Cl₂.

3. Write the oxidation state of nickel in [Ni(CO)₄]

*4. What is the coordination number of central atom in [Co(C₂O₄)₃]^3–? [Ans. : 6]

5. What is the coordination number of iron in [Fe (EDTA)]– ? [Ans. : 6]

6. Write the name of a complex compound used in chemotherapy.

[Ans. : Cis–Platin. [Pt(NH₃)₂ Cl₂]

7. Name the compound used to estimate the hardness of water volumetrically.

8. Give the IUPAC name of [Pt Cl₂ (NH₂CH₃) (NH₃)₂] Cl.

*9. How many geometrical isomers are possible for the tetrahedral complex [Ni(CO)₄].

[Ans. : No isomer, as the relative positions of the unidentate ligands attached to the central metal atom are same with respect to each other].

10. Arrange the following in the increasing order of conductivity in solution.

[Ni(NH₃)₆]Cl₂; [Co(NH₃)₆]Cl₃ and [CoCl₂(en)₂] Cl

11. Arrange the following ligands in increasing order of Δo (Crystal field splitting energy) for octahedral complexes with a particular metal ion. Cl –, NH₃, I –, CO, en. 

12. Write I.U.P.A.C. name of Tollens’ reagent.

13. Which is more stable? K₃[Fe(CN)₆] or K₄[Fe(CN)₆]

14. Calculate the overall dissociation equilibrium constant for the [Cu(NH₃)₄]²⁺ ion. Given that overall stability constant (β₄) for this complex is 2.1 × 10¹³. [Ans. : 4.7 × 10^–14]

*15. What is a chelate ligand? Give one example.

16. Write the I.U.P.A.C. name of Li[AlH₄].

17. Name one homogeneous catalyst used in hydrogenation of alkenes.

*18. Name the types of isomerism shown by coordination entity : [CrCl₂(Ox)2]^3–

*19. [Ti(H₂O)₆]Cl₃ is coloured but on heating becomes colourless. Why?

*20. Write the IUPAC name of ionization isomer of [Co(NH₃)₅(SO₄)] Br

*21. Write the formula and the name of the coordinate isomer of [Co(en)₃] [Cr(CN)₆].

[Ans. : [Cr(en)₃] [Co(CN)₆] Tris- (ethane –1, 2, diammine) chromium (III) hexacyanocobaltate (III)]

SA(I) TYPE QUESTIONS (2 - MARK QUESTIONS)

*22. Write two differences between a double salt and a coordination compound with the help of an example of each.

23. Mention the main postulates of Werner’s Theory.

24. Define (a) Homoleptic and (b) Heteroleptic complexes with the help of one example of each.

25. In the following coordination entity : [Cu(en)₂]²⁺

(a) Identify the ligand involved and

(b) Oxidation state of copper metal.

27. Calculate the magnetic moments of the following complexes :

(i) [Fe(CN)₆]^4– (ii) [CoF₆]^3–

28. Explain the following :

(a) [Fe(CN)₆]^3– is an inner orbital complex whereas [FeF₆]^3– is an outer orbital complex.

(b) NH₃ acts as complexing agent but NH₄ + does not.

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