Question 1

Aluminum reacts with oxygen in the air to form a protective oxide coating. Silver also reacts with compounds in air to form a black coating. What substance is formed?

Accepted Answer

A)   silver oxide
B)   silver chloride
C)   silver sulfide
D)   silver carbonate
E)   silver nitrideF) B) and E)
G) A) and D)

Question 2

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 E)
G) B) and D)

Question 3

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) B) and D)

Question 4

According to valence bond theory, what would be the set of hybrid orbitals used when a Period 4 transition metal forms a tetrahedral complex?

Accepted Answer

A)   d2sp
B)   dsp2
C)   dsp3
D)   sp3
E)   d2p2F) A) and C)
G) A) and B)

Question 5

The compound K3[Fe(CN) 6] is used in calico printing and wool dyeing. Give its systematic name.

Accepted Answer

A)   potassium iron(III)  hexacyanate
B)   tripotassium iron(III)  hexacyanate
C)   potassium hexacyanoferrate(III) 
D)   potassium hexacyanideferrate
E)   none of the aboveF) C) and D)
G) None of the above

Question 6

Why is the +2 oxidation state so common among transition elements?

Accepted Answer

The outermost (ns²) e...

Question 7

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

Accepted Answer

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

Question 8

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

Question 9

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) D) and E)
G) A) and E)

Question 10

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

Accepted Answer

A)   +2
B)   +4
C)   +6
D)   +8
E)   none of the aboveF) A) and E)
G) C) and D)

Question 11

The dxy and the dx2-y2 orbitals both lie in the xy plane, yet for a metal ion in an octahedral complex the energy of the dxy orbital is lower than that of the dx2-y2orbital. Explain this using the arguments of crystal field theory.

Accepted Answer

The d_xy orbital lobes are directed between...

Question 12

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 13

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

Question 14

If M represents a transition element, which of the following oxides should be the least basic?

Accepted Answer

A)   MO
B)   M2O
C)   M2O3
D)   MO2
E)   MO3F) A) and D)
G) A) and C)

Question 15

According to valence bond theory, what would be the set of hybrid orbitals used when a Period 4 transition metal forms a square planar complex?

Accepted Answer

A)   d2sp
B)   d2p2
C)   dsp3
D)   sp3
E)   dsp2F) A) and B)
G) B) and E)

Question 16

All the actinide series of transition elements are radioactive.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following transition elements can have an oxidation number of +7?

Accepted Answer

A)   V
B)   Cr
C)   Mn
D)   Fe
E)   CoF) B) and E)
G) C) and E)

Question 18

Which of the following will be diamagnetic?

Accepted Answer

A)   Ni2+
B)   Cr2+
C)   Mn2+
D)   Co3+
E)   Ti4+F) None of the above
G) A) and D)

Question 19

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) A) and D)
G) All of the above

Question 20

Consider the following structures (1 and 2 are octahedral; 3 and 4 are square planar) .  Which one of the following statements about the above structures is correct?

Accepted Answer

A)   1 and 2 are superimposable.
B)   1 and 2 are geometric isomers.
C)   3 and 4 are structural isomers.
D)   3 and 4 are optical isomers.
E)   3 and 4 are geometric isomers.F) C) and E)
G) A) and E)

Exam 23: The Transition Elements and Their Coordination Compounds

Why is the +2 oxidation state so common among transition elements?

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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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Which of the following will be diamagnetic?

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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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All the actinide series of transition elements are radioactive.

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According to valence bond theory, what would be the set of hybrid orbitals used when a Period 4 transition metal forms a tetrahedral complex?

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

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

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

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Aluminum reacts with oxygen in the air to form a protective oxide coating. Silver also reacts with compounds in air to form a black coating. What substance is formed?

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Consider the following structures (1 and 2 are octahedral; 3 and 4 are square planar) . Which one of the following statements about the above structures is correct?

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Which of the following transition elements can have an oxidation number of +7?

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The compound K3[Fe(CN) 6] is used in calico printing and wool dyeing. Give its systematic name.

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If M represents a transition element, which of the following oxides should be the least basic?

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According to valence bond theory, what would be the set of hybrid orbitals used when a Period 4 transition metal forms a square planar complex?

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The ground state electronic configuration of Cr2+ is

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

Correct AnswerverifiedShow Answer

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

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The dxy and the dx2-y2 orbitals both lie in the xy plane, yet for a metal ion in an octahedral complex the energy of the dxy orbital is lower than that of the dx2-y2orbital. Explain this using the arguments of crystal field theory.

Correct AnswerverifiedThe dxy orbital lobes are directed between...View AnswerShow Answer

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The outermost (ns²) e...
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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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How many unpaired electrons are there in the Fe³⁺ ion?

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The compound K₃[Fe(CN) ₆] is used in calico printing and wool dyeing. Give its systematic name.

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The ground state electronic configuration of Cr²⁺ is

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According to Valence Bond theory, in the square planar Ni(CN) ₄^2- complex ion, the orbital hybridization pattern is

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The d_xy and the d_x²_-_y²orbitals both lie in the xy plane, yet for a metal ion in an octahedral complex the energy of the d_xy orbital is lower than that of the d_x²_-_y²orbital. Explain this using the arguments of crystal field theory.

Correct Answer
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The d_xy orbital lobes are directed between...
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