Quiz for Coordination Compounds

Q1: What is the central metal atom in a coordination compound called?

A. Central metal ion B. Ligand C. Counter ion D. Chelate

Q2: What is a ligand?

A. Molecule or ion bonded to the central metal B. Counter ion C. Central atom D. Solvent molecule

Q3: What type of bond forms between metal and ligand?

A. Coordinate covalent bond B. Ionic bond C. Hydrogen bond D. Metallic bond

Q4: What is the coordination number?

A. Number of ligand donor atoms bonded to metal B. Number of ligands C. Number of central metals D. Charge on complex

Q5: Which of the following is a bidentate ligand?

A. Ethylenediamine (en) B. Ammonia (NH3) C. Water (H2O) D. Chloride ion (Cl-)

Q6: What is the oxidation state of metal in [Fe(CN)6]4-?

A. +2 B. +3 C. +4 D. 0

Q7: What shape corresponds to coordination number 6?

A. Octahedral B. Tetrahedral C. Square planar D. Linear

Q8: Which ligand is a monodentate ligand?

A. Ammonia B. Ethylenediamine C. Oxalate D. EDTA

Q9: What is the formula of the complex ion in [Co(NH3)6]Cl3?

A. [Co(NH3)6]3+ B. Co3+ C. Cl3- D. NH3

Q10: What type of isomerism is shown by [Co(NH3)4Cl2]Cl?

A. Geometrical isomerism B. Optical isomerism C. Linkage isomerism D. Ionization isomerism

Q11: Which of the following is an example of a chelate?

A. [Fe(en)3]3+ B. [Fe(CN)6]4- C. [Co(NH3)6]3+ D. [Cu(H2O)4]2+

Q12: What does the term “coordination sphere” mean?

A. Central metal and ligands directly bonded B. Counter ions C. Solvent molecules D. Free ions

Q13: Which complex is called “potassium ferrocyanide”?

A. [K4Fe(CN)6] B. [K3Fe(CN)6] C. [K2Fe(CN)6] D. [Fe(CN)6]4-

Q14: What is the oxidation state of chromium in [Cr(NH3)3Cl3]?

A. +3 B. +2 C. +6 D. +1

Q15: Which ligand can show linkage isomerism?

A. NO2- B. NH3 C. H2O D. Cl-

Q16: What is the denticity of oxalate ion (C2O4 2-)?

A. Bidentate B. Monodentate C. Tridentate D. Polydentate

Q17: What kind of isomerism is ionization isomerism?

A. Exchange of ligands with counter ions B. Change in ligand connectivity C. Different spatial arrangement D. Non-superimposable mirror images

Q18: Which complex is square planar?

A. [Pt(NH3)2Cl2] B. [Co(NH3)6]3+ C. [Fe(CN)6]4- D. [Cu(H2O)4]2+

Q19: What is the coordination number of nickel in [Ni(CO)4]?

A. 4 B. 2 C. 6 D. 3