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1 A) [Ar]4s 2 3d 8 B) [Ar]4s 2 3d 6 C) [Ar]3d 10 D) [Ar]3d 8 E) none of the above 2 d electrons does a Fe3+ ion have?A) 1 B) 2 C) 3 D) 4 E) 5 3 A) Sc3+ B) Ti4+ C) Mn7+ D) Ni2+ E) V5+ 4 A) MnCl2 ·4H2 O: manganese(II) chloride tetrahydrate B) CoCl2 ·6H2 O: cobalt(II) chloride hexahydrate C) Ni(NO3 )2 ·6H2 O: nickel(II) nitrate hexahydrate D) CuSO4 ·5H2 O: copper(I) sulfate pentahydrate. E) ZnSO4 ·7H2 O: zinc sulfate heptahydrate. 5 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. 6 incorrect ?A) MnO can react to neutralize an acidic solution. B) A solution of Mn2 O7 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. 7 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 Hg2 2+ 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. 8 A) cyanide, CN- B) nitrite, NO2 - C) ammonia, NH3 D) thiocyanate, SCN- E) ethylenediamine, H2 NCH2 CH2 NH2 9 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. 10 3 [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) 11 A) [Pt(NH3 )3 Cl]+ B) [Fe(CN)6 ]3- C) [Pt(NH3 )Br3 ]- D) [Pt(en)Cl2 ] E) [Co(H2 O)4 Cl2 ]+ 12 3 )4 Cl2 ]+ . 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. 13 A) d 2 sp 3 B) dsp 2 C) dsp 3 D) sp 3 E) d 2 sp 14 3 )6 ]3+ ?A) 1 B) 2 C) 3 D) 4 E) 5 15 A) I- B) CN- C) NO2 - D) CO E) en
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