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1 | | What is the electron configuration of a nickel atom? |
| | A) | [Ar]4s23d8 |
| | B) | [Ar]4s23d6 |
| | C) | [Ar]3d10 |
| | D) | [Ar]3d8 |
| | E) | none of the above |
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2 | | How many 3d electrons does a Fe3+ ion have? |
| | A) | 1 |
| | B) | 2 |
| | C) | 3 |
| | D) | 4 |
| | E) | 5 |
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3 | | Which of the following ions is paramagnetic? |
| | A) | Sc3+ |
| | B) | Ti4+ |
| | C) | Mn7+ |
| | D) | Ni2+ |
| | E) | V5+ |
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4 | | Which of the following pairs of names and formulas do not refer to the same compound? |
| | A) | MnCl2·4H2O: manganese(II) chloride tetrahydrate |
| | B) | CoCl2·6H2O: cobalt(II) chloride hexahydrate |
| | C) | Ni(NO3)2·6H2O: nickel(II) nitrate hexahydrate |
| | D) | CuSO4·5H2O: copper(I) sulfate pentahydrate. |
| | E) | ZnSO4·7H2O: zinc sulfate heptahydrate. |
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5 | | Which of the following statements about the electron configurations of lanthanide elements is correct? |
| | A) | All of the lanthanides have at least one electron in a 5d orbital. |
| | B) | None of the lanthanides have any electrons in 5d orbitals. |
| | C) | In compounds, the lanthanides are usually in the +4 oxidation state. |
| | D) | Cerium forms a stable ion with a charge of +4. |
| | E) | None of the above statements is correct. |
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6 | | Which of the following statements about manganese compounds is incorrect? |
| | A) | MnO can react to neutralize an acidic solution. |
| | B) | A solution of Mn2O7 in water is acidic. |
| | C) | A solution of KMnO4 in water is an oxidizing agent. |
| | D) | A concentrated solution of MnO2 in water is used as the electrolyte in the commercial wet cell battery. |
| | E) | Manganese compounds are often colored. |
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7 | | Which of the following statements about mercury is incorrect? |
| | A) | Mercury is easily obtained by heating the ore cinnabar, HgS. |
| | B) | Certain metals can readily dissolve in mercury, for example zinc and sodium. |
| | C) | Mercury forms both the Hg22+ and the Hg2+ ion. |
| | D) | Solid mercury is a good electrical conductor, but in the liquid state it conducts poorly. |
| | E) | Organomercury compounds are highly toxic and can accumulate in fatty tissue. |
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8 | | Which of the following ligands is bidentate? |
| | A) | cyanide, CN- |
| | B) | nitrite, NO2- |
| | C) | ammonia, NH3 |
| | D) | thiocyanate, SCN- |
| | E) | ethylenediamine, H2NCH2CH2NH2 |
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9 | | A regular octahedron |
| | A) | is a polyhedron with eight triangular faces. |
| | B) | is a polyhedron with eight apices. |
| | C) | is a polyhedron with six apices, each equidistant from every one of the others. |
| | D) | is a polyhedron with eight straight-line edges. |
| | E) | is a polyhedron with eight-sided faces. |
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10 | | What is the best name for K3[Fe(CN)6], a compound used in calico printing and wool dyeing? |
| | A) | tripotassium iron(III)hexacyanate |
| | B) | potassium hexacyanoferrate(III) |
| | C) | potassium iron(III)hexacyanate |
| | D) | potassium hexacyanideferrate |
| | E) | hexacyano tripotassiumferrate(III) |
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11 | | Which of the following complexes could have isomeric forms? |
| | A) | [Pt(NH3)3Cl]+ |
| | B) | [Fe(CN)6]3- |
| | C) | [Pt(NH3)Br3]- |
| | D) | [Pt(en)Cl2] |
| | E) | [Co(H2O)4Cl2]+ |
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12 | | Consider the complex ion [Co(NH3)4Cl2]+. Which of the following statements is correct? |
| | A) | The coordination number of cobalt in this complex ion is 4. |
| | B) | There are two optical isomers with this formula. |
| | C) | There is at least one isomer that cannot be sliced into two mirror-image halves. |
| | D) | The distance between N nuclei is the same for every N-N pair. |
| | E) | There are two geometric isomers with this formula. |
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13 | | According to valence bond theory, what set of hybrid orbitals is involved when a Period 4 transition metal forms a square planar complex? |
| | A) | d2sp3 |
| | B) | dsp2 |
| | C) | dsp3 |
| | D) | sp3 |
| | E) | d2sp |
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14 | | How many unpaired electrons are there in the complex ion [Cr(NH3)6]3+? |
| | A) | 1 |
| | B) | 2 |
| | C) | 3 |
| | D) | 4 |
| | E) | 5 |
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15 | | Which of the following ligands is most likely to form a high spin octahedral complex with cobalt(II)? |
| | A) | I- |
| | B) | CN- |
| | C) | NO2- |
| | D) | CO |
| | E) | en |
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