Question 1

In the formation of a transition metal complex, the central metal atom or ion acts as

Accepted Answer

A)  an Arrhenius acid. 
B)  a Brønsted-Lowry acid. 
C)  a Brønsted-Lowry base. 
D)  a Lewis acid. 
E)  a Lewis base. 
A)  an Arrhenius acid. 
B)  a Brønsted-Lowry acid. 
C)  a Brønsted-Lowry base. 
D)  a Lewis acid. 
E)  a Lewis base.

Question 2

Consider the following octahedral complex structures, each involving ethylene diamine and two different, unidentate ligands X and Y.   Which one, if any, of the following is a pair of optical isomers?

Accepted Answer

A)  1 and 2 
B)  1 and 3 
C)  1 and 4 
D)  3 and 4 
E)  None of these choices is correct. 
A)  1 and 2 
B)  1 and 3 
C)  1 and 4 
D)  3 and 4 
E)  None of these choices is correct.

Question 3

Of the 3d transition series of elements, scandium has the greatest atomic radius.

Accepted Answer

A) True 
 B)False

Question 4

A characteristic of ligands is that

Accepted Answer

A)  they are Lewis acids. 
B)  they are Lewis bases. 
C)  they are ions. 
D)  they are electron pair acceptors. 
E)  they are Brønsted-Lowry acids. 
A)  they are Lewis acids. 
B)  they are Lewis bases. 
C)  they are ions. 
D)  they are electron pair acceptors. 
E)  they are Brønsted-Lowry acids.

Question 5

What is the highest possible oxidation state for molybdenum, Mo?

Accepted Answer

A)  +2 
B)  +4 
C)  +6 
D)  +8 
E)  None of these choices is correct. 
A)  +2 
B)  +4 
C)  +6 
D)  +8 
E)  None of these choices is correct.

Question 6

Mercury(II) compounds are assimilated into the food chain because

Accepted Answer

A)  they are ionic substances that are concentrated in cell tissue. 
B)  they complex with compounds in the blood which carries them to the muscle tissue of organisms. 
C)  they are incorporated into bone structure. 
D)  they are very soluble in water and easily ingested. 
E)  they are nonpolar substances that are concentrated in fatty tissues as they move up the food chain. 
A)  they are ionic substances that are concentrated in cell tissue. 
B)  they complex with compounds in the blood which carries them to the muscle tissue of organisms. 
C)  they are incorporated into bone structure. 
D)  they are very soluble in water and easily ingested. 
E)  they are nonpolar substances that are concentrated in fatty tissues as they move up the food chain.

Question 7

The Cu2+ ion has 1 unpaired electron.

Accepted Answer

A) True 
 B)False

Question 8

According to Valence Bond theory, in the square planar Ni(CN)42¯ complex ion, the orbital hybridization pattern is:

Accepted Answer

A)  sp3 
B)  dsp2 
C)  d2sp 
D)  d2sp3 
E)  None of these choices is correct. 
A)  sp3 
B)  dsp2 
C)  d2sp 
D)  d2sp3 
E)  None of these choices is correct.

Question 9

Which of the following ions is most likely to form colored compounds?

Accepted Answer

A)  Sc3+ 
B)  Cu+ 
C)  Zn2+ 
D)  Cr3+ 
E)  Ca2+ 
A)  Sc3+ 
B)  Cu+ 
C)  Zn2+ 
D)  Cr3+ 
E)  Ca2+

Question 10

The most common oxidation state for ions of the transition elements is:

Accepted Answer

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

Question 11

Which of the following octahedral complexes should have the largest crystal field splitting energy, $\Delta$?

Accepted Answer

A)  [Cr(H2O)6]3+ 
B)  [Cr(SCN)6]3¯ 
C)  [Cr(NH3)6]3+ 
D)  [Cr(CN)6]3¯ 
E)  [Cr(en)3]3+ (en = ethylenediamine) 
A)  [Cr(H2O)6]3+ 
B)  [Cr(SCN)6]3¯ 
C)  [Cr(NH3)6]3+ 
D)  [Cr(CN)6]3¯ 
E)  [Cr(en)3]3+ (en = ethylenediamine)

Question 12

Which of the following ions could exist in only the high-spin state in an octahedral complex?

Accepted Answer

A)  Cr2+ 
B)  Mn4+ 
C)  Fe3+ 
D)  Co3+ 
E)  Ni2+ 
A)  Cr2+ 
B)  Mn4+ 
C)  Fe3+ 
D)  Co3+ 
E)  Ni2+

Question 13

Which of the following should be the strongest reducing agent?

Accepted Answer

A)  Fe 
B)  Ru 
C)  Os 
D)  Re 
E)  Cu 
A)  Fe 
B)  Ru 
C)  Os 
D)  Re 
E)  Cu

Question 14

Which of the following will be the strongest oxidizing agent?

Accepted Answer

A)  Cr 
B)  Cr(II) 
C)  Cr(III) 
D)  Cr(IV) 
E)  Cr(VI) 
A)  Cr 
B)  Cr(II) 
C)  Cr(III) 
D)  Cr(IV) 
E)  Cr(VI)

Question 15

Which of the following ions is least likely to form colored compounds?

Accepted Answer

A)  Mn2+ 
B)  Cr5+ 
C)  Sc3+ 
D)  Fe3+ 
E)  Co2+ 
A)  Mn2+ 
B)  Cr5+ 
C)  Sc3+ 
D)  Fe3+ 
E)  Co2+

Question 16

All atoms of the first transition series of elements have the ground state electronic configuration [Ar]4s23dx, where x is an integer from 1 to 10.

Accepted Answer

A) True 
 B)False

Question 17

How many unpaired electrons are there in the Fe3+ ion?

Accepted Answer

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

Question 18

In the spectrochemical series, which one of the following ligands has the strongest field?

Accepted Answer

A)  H2O 
B)  CN¯ 
C)  NH3 
D)  OH¯ 
E)  Cl¯ 
A)  H2O 
B)  CN¯ 
C)  NH3 
D)  OH¯ 
E)  Cl¯

Question 19

Write the formula for sodium tetracyanonickelate(II).

Accepted Answer

A)  Na[Ni(CN)4] 
B)  Na[Ni(CN)4]2 
C)  Na2[Ni(CN)4] 
D)  Na4[Ni(CN)4] 
E)  None of these choices is correct. 
A)  Na[Ni(CN)4] 
B)  Na[Ni(CN)4]2 
C)  Na2[Ni(CN)4] 
D)  Na4[Ni(CN)4] 
E)  None of these choices is correct.

Question 20

The ground state electronic configuration of Cr2+ is:

Accepted Answer

A)  [Ar]4s13d5 
B)  [Ar]4s23d4 
C)  [Ar]3d4 
D)  [Ar]4s13d3 
E)  [Ar]4s23d2 
A)  [Ar]4s13d5 
B)  [Ar]4s23d4 
C)  [Ar]3d4 
D)  [Ar]4s13d3 
E)  [Ar]4s23d2

Exam 23: The Transition Elements and Their Coordination Compounds

In the formation of a transition metal complex, the central metal atom or ion acts as

Consider the following octahedral complex structures, each involving ethylene diamine and two different, unidentate ligands X and Y. Which one, if any, of the following is a pair of optical isomers?

Of the 3d transition series of elements, scandium has the greatest atomic radius.

A characteristic of ligands is that

What is the highest possible oxidation state for molybdenum, Mo?

Mercury(II) compounds are assimilated into the food chain because

The Cu2+ ion has 1 unpaired electron.

According to Valence Bond theory, in the square planar Ni(CN)42¯ complex ion, the orbital hybridization pattern is:

Which of the following ions is most likely to form colored compounds?

The most common oxidation state for ions of the transition elements is:

Which of the following octahedral complexes should have the largest crystal field splitting energy, Δ\DeltaΔ ?

Which of the following ions could exist in only the high-spin state in an octahedral complex?

Which of the following should be the strongest reducing agent?

Which of the following will be the strongest oxidizing agent?

Which of the following ions is least likely to form colored compounds?

All atoms of the first transition series of elements have the ground state electronic configuration [Ar]4s23dx, where x is an integer from 1 to 10.

How many unpaired electrons are there in the Fe3+ ion?

In the spectrochemical series, which one of the following ligands has the strongest field?

Write the formula for sodium tetracyanonickelate(II).

The ground state electronic configuration of Cr2+ is:

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main-Group Elements

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

Nuclear Reactions and Their Applications

Filters

The Cu²⁺ ion has 1 unpaired electron.

According to Valence Bond theory, in the square planar Ni(CN)₄²¯ complex ion, the orbital hybridization pattern is:

Which of the following octahedral complexes should have the largest crystal field splitting energy, $\Delta$ ?

All atoms of the first transition series of elements have the ground state electronic configuration [Ar]4s²3d^x, where x is an integer from 1 to 10.

How many unpaired electrons are there in the Fe³⁺ ion?

The ground state electronic configuration of Cr²⁺ is: