TOPIC PRACTICE 3 - Coordination Compounds (MCQ Format)
1. Which type of bond formed between metal and ligand?
(a) Synergic bond (b) -bond (c) -bond (d) None of these
2. The M C-bond is formed by the
(a) Donation of a pair of electrons (b) Sharing of a pair of electrons (c) Receiving a pair of electrons (d)
None of the above
3. The total number of metal-metal bond present in [Co2(CO)8] is
(a) 0 (b) 3 (c) 2 (d) 1
4. For the reaction of the type M + 4L ML4
(a) Larger the stability constant, lower the proportion of ML4 in solution
(b) Larger the stability constant, higher the proportion of ML4 in solution
(c) Smaller the stability constant, higher the proportion of ML4 in solution
(d) None of the above
5. The reciprocal of the formation constant is called
(a) Instability constant (b) Dissociation constant (c) Stability constant (d) Both (a) and (b)
6. Which of the following complexes formed by Cu^2 ions is most stable?
(a) [Cu(NH3)4]^2, log K = 11.6
(b) [Cu(CN)4]^2, log K = 273
(c) [Cu(en)2]^2, log K = 15.4
(d) [Cu(H2O)4]^2, log K = 8.9
7. Hardness of water is estimated by Na2EDTA because
(a) Ca^2 forms stable complexes with EDTA
(b) Mg^2 forms stable complexes with EDTA
(c) Zn^2 forms unstable complexes with EDTA
(d) Both (a) and (b)
8. For lead-poisoning, the antidote used is
(a) White of an egg (b) Cis-platin (c) Nickel (d) EDTA
9. In photography, Na2S2O3·5H2O is used
(a) For converting AgBr into Ag2SO4
(b) For converting AgBr into soluble thiosulphate complex
(c) For converting AgBr into silver thiosulphate
(d) In reduction of Ag metal from AgBr
10. Which of the following is an example of a metal carbonyl having metal-metal bond?
(a) Fe(CO)5 (b) Ni(CO)4 (c) Mn2(CO)10 (d) Cr(CO)6
11. A coordination compound used in cancer treatment is:
(a) EDTA (b) Cis-platin (c) Ni(CO)4 (d) Hemoglobin
12. Complex used as oxygen carrier in blood:
(a) Chlorophyll (b) Hemoglobin (c) Myoglobin (d) Vitamin B12
13. Nature of bonding in metal carbonyls involves:
(a) -donation only (b) -backbonding only (c) Both -donation and -backbonding (d) Ionic bonding
14. Given 4 = 2.1 × 10¹³ for [Cu(NH3)4]^2, overall dissociation constant is:
(a) 2.1 × 10¹³ (b) 4.76 × 10¹ (c) 4.76 × 10¹³ (d) 1 / (2.1 × 10¹³)
15. Which of the following is NOT a use of coordination compounds?
(a) Biological systems (b) Medicinal chemistry (c) Organic synthesis only (d) Extraction/metallurgy
16. Stability of coordination compounds in solution means:
(a) Insolubility (b) Dissociation (c) Tendency to remain complexed (d) Reaction with acids
17. Given Kf of [Ag(NH3)2] is 1.7×10 and [Ag(S2O3)2]³ is 1.0×10¹³, which is more stable?
(a) NH3 complex (b) S2O3^2 complex (c) Both equally stable (d) None
18. Structure of homoleptic [Cr(CO)6] is:
(a) Linear (b) Tetrahedral (c) Octahedral (d) Square planar
19. Stepwise and overall stability constants are:
(a) Unrelated (b) Additive (c) Multiplicative (d) Equal
20. Coordination compounds play roles in:
(a) Photosynthesis (b) Iron removal (c) Photography (d) All of the above
21. Match the following:
(i) Ring in hemoglobin (a) Porphyrin (b) Corrin (c) Hemin (d) EDTA
(ii) Vitamin B12 contains (a) Fe (b) Mg (c) Co (d) Zn
(iii) Catalyst complex (a) Ni(CO)4 (b) K4[Fe(CN)6] (c) Fe(CO)5 (d) [Ag(NH3)2]
