Worksheet: Coordination Compounds

 

Worksheet: Coordination Compounds

Class: 12 | Subject: Chemistry

Section A: Objective Questions (1 mark each)

1. Write the IUPAC name of the complex:
   $[Co(NH}_3\text{)}_6\text{]}^{3+}$

2. Identify the type of isomerism exhibited by the complex $[Co(NH}_3\text{)}_5\text{Cl]}^{2+}$.

3. Calculate the oxidation state of Cr in $[Cr(H}_2\text{O)}_4\text{Cl}_2\text{]}^{+}$.

4. Name the ligand in the complex $[Ni(CN}_4\text{)]}^{2-}$.

5. What is the coordination number of Fe in $[Fe(C}_2\text{O}_4\text{)}_3\text{]}^{3-}$?

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Section B: Short Answer Questions (2-3 marks each)

6. Draw the structures of geometrical isomers of the complex $[Pt(NH}_3\text{)}_2\text{Cl}_2]$.

7. $[Fe(CN}_6\text{)]}^{3-}$ and $[FeF}_6\text{]}^{3-}$ are both octahedral complexes. Explain why one is high spin and the other is low spin.

8. Write the formula of the following coordination compound:
   Tetraamminecopper(II) sulfate.

9. Explain the bonding in $[Ni(CO)}_4\text{]}$ using the Valence Bond Theory (VBT).

10. What is the significance of crystal field stabilization energy (CFSE) in coordination compounds?

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Section C: Long Answer Questions (5 marks each)

11. (a) Explain the Crystal Field Splitting in an octahedral field with a labeled diagram.
    (b) How does the magnitude of crystal field splitting differ between weak and strong field ligands?

12. Describe the preparation, structure, and magnetic properties of the complex $[CoF}_6\text{]}^{3-}$.

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Section D: Assertion-Reason Questions (4 marks each)

13. For the following statements, choose the correct option:
    Assertion (A): $\text{[Ni(CN}_4\text{)]}^{2-}$ is diamagnetic.
    Reason (R): Cyanide is a strong field ligand that causes pairing of electrons.

    • (a) Both A and R are true, and R is the correct explanation of A.
    • (b) Both A and R are true, but R is not the correct explanation of A.
    • (c) A is true, but R is false.
    • (d) A is false, but R is true.

14. Assertion (A): Coordination compounds are widely used in medicines.
    Reason (R): EDTA is used to treat lead poisoning.

    • (a) Both A and R are true, and R is the correct explanation of A.
    • (b) Both A and R are true, but R is not the correct explanation of A.
    • (c) A is true, but R is false.
    • (d) A is false, but R is true
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