Chemistry Quiz

CHAPTER-23 HW.

Rahaf AlBathi 121114
Question 1
The electron configuration of a Ni2+ ion is: | A) [Ar]4s23d8 | | B) [Ar]4s23d6 | | C) [Ar]3d8 | | D) [Ar]3d6 |

Question 2
The Fe3+ ion has _____ electrons in 3d orbitals. | A) 6 | | B) 5 | | C) 4 | | D) 3 | | E) 2 |

Question 3
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 |

Question 4
In K[Cu(CN)2], how many 3d electrons does the copper ion have? | A) 10 | | B) 9 | | C) 8 | | D) 7 | | E) 6 |

Question 5
Which of the following is a bidentate ligand? | A) cyanide
ion | | B) nitrite ion | | C) ammonia | | D) thiocyanate ion | | E) ethylenediamine |
Question 6
The correct chemical formula for tetraaminecopper(II) chloride is: | A) [Cu(NH3)4Cl] | | B) [Cu(NH3)4]Cl2 | | C) [Cu(NH3)4]Cl3 | | D) [Cu(NH3)4]Cl | | E) [Cu(NH3)]Cl4 |

Question 7
The best name for K[Cr(NH3)2Cl2(CN)2] is: | A) potassium diaminedichlorodicyanochromate(III) | | B) potassium diaminedichlorodicyanochromium(III) | | C) potassium diaminedichlorochromatium(III) cyanide | | D) potassium diaminedichlorochromate(II) cyanide | | E) potassium diaminedichlorodicyanochromate(II) |

Question 8
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]- |

Question 9
Which of the following ligands is most likely to form a high spin octahedral complex with cobalt(II)? | A) CN- | | B) NO2- | | C) I- | | D) CO | | E) en |

Question 10
In the complex ion ML6n+, Mn+ has four d electrons and L is a weak field ligand. According to crystal field theory, the magnetic properties of this complex ion correspond to the presence of how many unpaired electrons? | A) 0 | | B) 1 | | C) 2 | | D) 3 | | E) 4 |

Question 11
The magnitude of crystal field splitting has a direct effect on the color of complex ions. | A) True | | B) False |