Question 1

The Cu2+ ion has 1 unpaired electron.

Accepted Answer

A) True 
 B)False

Question 2

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 3

Which of the following should be the strongest reducing agent?

Accepted Answer

A)   Fe
B)   Ru
C)   Os
D)   Re
E)   CuF) A) and E)
G) All of the above

Question 4

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¯F) None of the above
G) C) and D)

Question 5

The ground state electronic configuration of Cr2+ is:

Accepted Answer

A)   [Ar]4s13d5
B)   [Ar]4s23d4
C)   [Ar]3d4
D)   [Ar]4s13d3
E)   [Ar]4s23d2F) B) and E)
G) A) and E)

Question 6

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) F) A) and B)
G) A) and D)

Question 7

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.F) C) and D)
G) All of the above

Question 8

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.F) A) and E)
G) C) and D)

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

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

Accepted Answer

A)   5
B)   4
C)   3
D)   2
E)   1F) A) and B)
G) A) and E)

Question 11

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.F) B) and C)
G) A) and D)

Question 12

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

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)  F) A) and E)
G) A) and B)

Question 13

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

Accepted Answer

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

Question 14

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.F) C) and D)
G) A) and B)

Question 15

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.F) B) and E)
G) A) and B)

Question 16

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

Accepted Answer

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

Question 17

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+F) A) and D)
G) A) and B)

Question 18

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

Accepted Answer

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

Question 19

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.F) A) and D)
G) C) and D)

Question 20

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.F) C) and D)
G) D) and E)

Exam 23: The Transition Elements and Their Coordination Compounds

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

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

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Which of the following will be the strongest oxidizing agent?

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The Cu2+ ion has 1 unpaired electron.

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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.

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

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

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

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

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A characteristic of ligands is that

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Write the formula for sodium tetracyanonickelate(II) .

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

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

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

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The ground state electronic configuration of Cr2+ is:

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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?

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

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

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

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Which of the following should be the strongest reducing agent?

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The Cu²⁺ ion has 1 unpaired electron.

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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.

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

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

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The ground state electronic configuration of Cr²⁺ is:

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

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