Test tasks

 

 

1. What is the number of unpaired electrons in the low-spin complex [Co(NH3)6]Cl3
A. 0
B. 1
C. 2
D. 3
E. 4
2. What is the coordination number of cobalt in the complex
[Co(en)(NH3)2Cl2]ClO4?
A. +2
B. +1
C. +5
D. +6
E. +3
3. Which of the following is most likely a tetrahedral complex?
A. [Zn(NH3)2Cl2]
B. [Co(NH3)3Cl3]
C. [Co(NH3)6]2+
D. [Ni(H2O)6]SO4
E. [Co(en)2(H2O)Cl]2+
4. What is the correct name for the coordination compound [Cr(en)2(CN)2]Cl?
A. Chromium (III) (diethylenediamine) biscyano chloride
B. dicyanobis (ethylenediamine) chromium (III) chloride
C. dicyanobis (ethylenediamine) chromium (III) dichloride
D. bis(ethylenediamine) dicyanochromium (III) chloride
E. bis(ethylenediamine) dicyanochromium (III) dichloride
5. Molar conductivity of solution of compound is 0. Choose it compound from list:
A. [Pt(NH3)6] Cl4
B. [Pt(NH3)4Cl2] Cl2
C. [Pt(NH3)2Cl4]
D. PtCl4×2KCl
E. [Pt(NH3)5Cl]Cl3
6. Choose formula of complex compound:
A. (CuOH)2CO3
B. CaClOCl
C. KAl(SO4)2
D. NaTl(NO3)2
E. K4[Fe(CN)6]
7. How many chloride-ions in [Pt(NH3)4Cl2]Cl2 can react with AgNO3:
A. 3
B. 4
C. 0
D. 1
E. 2
8. Formula of compound is K3[Co(NO2)5Cl] Choose ions of outer coordination sphere:
A. [Co(NO2)5Cl]3-
B. K+
C. Co3+
D. Absent
E. Cl-
9. What size of most stable cycles of chelates?
A. 3 and 4
B. 4 and 5
C. 3 and 7
D. 5 and 6
E. 7 and 8
10. Choose name of the compound [Cr(H2O)3F3]
A. potassium diaquatetrafluorochromate (III)
B. monochlorotetraquachromium
C. monofluorotetraquachromium
D. tetrafluorodiaquachromium
E. trifluotriaquachromium (III)
11. The electron configuration of a Ni2+ ion is:
A. [Ar]4s23d8
B. [Ar]4s23d6
C. [Ar]3d8
D. [Ar]3d6
12. What ligand is monodentate?
A. B4O72-
B. NH3
C. SO42-
D. H2N-CH2-CH2-NH2
E. PO43-
13. A ligand is:
A. a molecule or ion that has at least one lone pair of electrons
B. a nucleophile
C. a Lewis base
D. part of a coordination compound
E. All of the above
14. Which of the following species could exist as a pair of isomers?
A. [Pt(NH3)3Cl]+
B. [Fe(CN)6]3-
C. [Co(H2O)4Cl2]+
D. [Pt(en)Cl2]
E. [Pt(NH3)Br3]-
15. Formula of compound is [Ag(NH3)2]NO3 Choose formula of ligand:
A. NO3-
B. [Ag(NH3)2]+
C. NH3
D. Ag +
16. What ligand is bidentate?
A. CN-
B. NO2-
C. NH3
D. H2O
E. C2O42-
17. Formula of compound is [Co(NH3)5(NO2)]Cl2. Choose inner coordination sphere:
A. NO2
B. Cl –
C. Co3+
D. NH3
E. [Co(NH3)5(NO2)]2+
18. Choose formula of aquacomplex:
A. MgSO4× H2O
B. KCl × MgCl2 × 6H2O
C. NaCl × 2H2O
D. [Co(H2O)6]Cl2
E. Na2SO4 × 10H2O
19. Formula of compound is (NH4)2[Pt(OH)2Cl4]. Choose ions of outer coordination sphere:
A. NH4+
B. [Pt(OH)2Cl4]2+
C. Pt 4+
D. OH-
E. Absent
20. Choose formula of potassium pentacyanoammineferrate (III):
A. K[Fe(CN)3(NH3)3]
B. K2[Fe(CN)4(NH3)2]
C. K4[Fe(CN)6]
D. K3[Fe(CN)6]
E. K3[Fe(CN)5NH3]