Question 1

In complexes of platinum(IV),the coordination number is usually

Accepted Answer

A) 3. 
B) 4. 
C) 6. 
D) 2. 
E) 1. 
A) 3. 
B) 4. 
C) 6. 
D) 2. 
E) 1. C

Question 2

The bond between a metal cation and a ligand is best classified as a(n)

Accepted Answer

A) polar covalent bond. 
B) ionic bond. 
C) nonpolar covalent bond. 
D) polydentate bond. 
E) coordinate covalent bond. 
A) polar covalent bond. 
B) ionic bond. 
C) nonpolar covalent bond. 
D) polydentate bond. 
E) coordinate covalent bond. E

Question 3

Which of the following is not a characteristic of the transition metals?

Accepted Answer

A) variable oxidation state 
B) the ability to form many colored compounds 
C) valence electrons in a d subshell 
D) high electronegativity 
E) the ability to form complex ions 
A) variable oxidation state 
B) the ability to form many colored compounds 
C) valence electrons in a d subshell 
D) high electronegativity 
E) the ability to form complex ions D

Question 4

Which of the following salts would be expected to be colored in aqueous solution?

Accepted Answer

A) AlI3 
B) CuI 
C) TiCl4 
D) CrCl2 
E) ScI3 
A) AlI3 
B) CuI 
C) TiCl4 
D) CrCl2 
E) ScI3

Question 5

Which of the following best describes the complex [Mn(H2O)6]2+?

Accepted Answer

A) sp3 hybridization; diamagnetic 
B) d2sp3 hybridization; diamagnetic 
C) d2sp3 hybridization; paramagnetic 
D) dsp3 hybridization; diamagnetic 
E) sp3 hybridization; paramagnetic 
A) sp3 hybridization; diamagnetic 
B) d2sp3 hybridization; diamagnetic 
C) d2sp3 hybridization; paramagnetic 
D) dsp3 hybridization; diamagnetic 
E) sp3 hybridization; paramagnetic

Question 6

Which of the following is a dark green solid?

Accepted Answer

A) CrO3 
B) KCr(SO4)2·12H2O 
C) Na2Cr2O7 
D) Na2CrO4 
E) Cr2O3 
A) CrO3 
B) KCr(SO4)2·12H2O 
C) Na2Cr2O7 
D) Na2CrO4 
E) Cr2O3

Question 7

How many unpaired electrons are there in an octahedral cobalt(III)complex with weak-bonding ligands?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 3 
E) 0 
A) 1 
B) 2 
C) 4 
D) 3 
E) 0

Question 8

The phenomenon called __________ contraction is responsible for the great similarity in atomic size and chemistry of 4d and 5d elements.

Accepted Answer

A) coordination 
B) isomeric 
C) lanthanide 
D) transition 
E) none of these 
A) coordination 
B) isomeric 
C) lanthanide 
D) transition 
E) none of these

Question 9

Which of the metal ions in the following complex ions has a d5 electron configuration?

Accepted Answer

A) V(H2O)62+ 
B) RhCl64- 
C) Co(CN)4- 
D) Fe(CN)63- 
E) Mo(NH3)63+ 
A) V(H2O)62+ 
B) RhCl64- 
C) Co(CN)4- 
D) Fe(CN)63- 
E) Mo(NH3)63+

Question 10

Which of the following is not a characteristic property of transition-element compounds?

Accepted Answer

A) Most of them are colored. 
B) Most of them are paramagnetic. 
C) Most of the metals exhibit multiple oxidation states. 
D) Most of the elements form many complexes. 
E) Most of the elements,upon ionizing,lose the d electrons first. 
A) Most of them are colored. 
B) Most of them are paramagnetic. 
C) Most of the metals exhibit multiple oxidation states. 
D) Most of the elements form many complexes. 
E) Most of the elements,upon ionizing,lose the d electrons first.

Question 11

What is the maximum oxidation number for titanium?

Accepted Answer

A) 5 
B) 2 
C) 4 
D) 3 
E) 6 
A) 5 
B) 2 
C) 4 
D) 3 
E) 6

Question 12

Which of the following is not a transition-metal?

Accepted Answer

A) cobalt 
B) iridium 
C) vanadium 
D) rhodium 
E) rubidium 
A) cobalt 
B) iridium 
C) vanadium 
D) rhodium 
E) rubidium

Question 13

Which of the following compounds is paramagnetic?

Accepted Answer

A) Li4[Fe(NO2)6] 
B) K3[Co(CN)6] 
C) K3[ScCl6] 
D) Na2[TiBr6] 
E) [Mn(H2O)6]Cl2 
A) Li4[Fe(NO2)6] 
B) K3[Co(CN)6] 
C) K3[ScCl6] 
D) Na2[TiBr6] 
E) [Mn(H2O)6]Cl2

Question 14

What is the maximum oxidation state for rhenium,Re?

Accepted Answer

A) 6 
B) 3 
C) 2 
D) 7 
E) 4 
A) 6 
B) 3 
C) 2 
D) 7 
E) 4

Question 15

All of the following elements have the oxidation states listed except

Accepted Answer

A) Ti,+3. 
B) Zn,+3. 
C) V,+3. 
D) Co,+3. 
E) Fe,+3. 
A) Ti,+3. 
B) Zn,+3. 
C) V,+3. 
D) Co,+3. 
E) Fe,+3.

Question 16

How many unpaired electrons are there in the tetrahedral complex ion [FeCl4]-?

Accepted Answer

A) 3 
B) 2 
C) 1 
D) 4 
E) 5 
A) 3 
B) 2 
C) 1 
D) 4 
E) 5

Question 17

Which of the following describes a d6 metal-ion complex with ligands that bond strongly to the metal ion?

Accepted Answer

A) Pairing energy is less than crystal field splitting,giving a low-spin complex. 
B) Pairing energy is greater than crystal field splitting,giving a low-spin complex. 
C) Pairing energy is less than crystal field splitting,giving a high-spin complex. 
D) A d6 ion has only one possible electron arrangement regardless of the ligands. 
E) Pairing energy is greater than crystal field splitting,giving a high-spin complex. 
A) Pairing energy is less than crystal field splitting,giving a low-spin complex. 
B) Pairing energy is greater than crystal field splitting,giving a low-spin complex. 
C) Pairing energy is less than crystal field splitting,giving a high-spin complex. 
D) A d6 ion has only one possible electron arrangement regardless of the ligands. 
E) Pairing energy is greater than crystal field splitting,giving a high-spin complex.

Question 18

How many optical isomers do the cis and trans isomers of [Co(en)2Br2]+ have?

Accepted Answer

A) cis,1 and trans,1 
B) cis,2 and trans,0 
C) cis,0 and trans,0 
D) cis,0 and trans,2 
E) cis,2 and trans,2 
A) cis,1 and trans,1 
B) cis,2 and trans,0 
C) cis,0 and trans,0 
D) cis,0 and trans,2 
E) cis,2 and trans,2

Question 19

Which of the following are constitutional isomers?
I.coordination isomers
II.linkage isomers
III.geometric isomers
IV.optical isomers

Accepted Answer

A) I,III,and IV 
B) II and III 
C) I and II 
D) I and III only 
E) II and IV only 
A) I,III,and IV 
B) II and III 
C) I and II 
D) I and III only 
E) II and IV only

Question 20

What is the correct formula for sodium tetrachlorocuprate(II)?

Accepted Answer

A) Na3[CuCl4] 
B) Na2[CuCl4] 
C) Na[CuCl4] 
D) Na4[CuCl4] 
E) Na2[CuCl6] 
A) Na3[CuCl4] 
B) Na2[CuCl4] 
C) Na[CuCl4] 
D) Na4[CuCl4] 
E) Na2[CuCl6]

Exam 22: The Transition Elements and Coordination Compounds

In complexes of platinum(IV),the coordination number is usually

The bond between a metal cation and a ligand is best classified as a(n)

Which of the following is not a characteristic of the transition metals?

Which of the following salts would be expected to be colored in aqueous solution?

Which of the following best describes the complex [Mn(H2O)6]2+?

Which of the following is a dark green solid?

How many unpaired electrons are there in an octahedral cobalt(III)complex with weak-bonding ligands?

The phenomenon called __________ contraction is responsible for the great similarity in atomic size and chemistry of 4d and 5d elements.

Which of the metal ions in the following complex ions has a d5 electron configuration?

Which of the following is not a characteristic property of transition-element compounds?

What is the maximum oxidation number for titanium?

Which of the following is not a transition-metal?

Which of the following compounds is paramagnetic?

What is the maximum oxidation state for rhenium,Re?

All of the following elements have the oxidation states listed except

How many unpaired electrons are there in the tetrahedral complex ion [FeCl4]-?

Which of the following describes a d6 metal-ion complex with ligands that bond strongly to the metal ion?

How many optical isomers do the cis and trans isomers of [Co(en)2Br2]+ have?

Which of the following are constitutional isomers? I.coordination isomers II.linkage isomers III.geometric isomers IV.optical isomers

What is the correct formula for sodium tetrachlorocuprate(II)?

Chemistry and Measurement

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Quantum Theory of the Atom

Electron Configurations and Periodicity

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Filters

Which of the following best describes the complex [Mn(H₂O)₆]²⁺?

Which of the metal ions in the following complex ions has a d⁵ electron configuration?

How many unpaired electrons are there in the tetrahedral complex ion [FeCl₄]^-?

Which of the following describes a d⁶ metal-ion complex with ligands that bond strongly to the metal ion?

How many optical isomers do the cis and trans isomers of [Co(en)₂Br₂]⁺ have?