Deck 19: The Transition Metals

Question 1

What is the correct arrangement of Sc, V, and Cu in order of increasing melting point?

A) Sc, V, Cu
B) Cu, Sc, V
C) Sc, Cu, V
D) V, Sc, Cu
E) Cu, V, Sc

Answer 1

Cu, Sc, V

Question 2

What is the correct arrangement of Cr, Ni, and Zn in order of decreasing density?

A) Cr, Ni, Zn
B) Ni, Cr, Zn
C) Zn, Ni, Cr
D) Zn, Cr, Ni
E) Ni, Zn, Cr

Answer 2

Cr, Ni, Zn

Question 3

What is the correct arrangement of Pd, Ni, and Pt in order of decreasing density?

A) Pd, Ni, Pt
B) Ni, Pd, Pt
C) Pt, Ni, Pd
D) Pt, Pd, Ni
E) Ni, Pt, Pd

Answer 3

Pt, Pd, Ni

Question 4

What is the correct arrangement of Hf, Ti, and Zr in order of increasing melting point?

A) Hf, Ti, Zr
B) Ti, Zr, Hf
C) Zr, Hf, Ti
D) Hf, Zr, Ti
E) Ti, Hf, Zr

Question 5

The transition metals with the electron configurations of 4s²3d² and 5s²4d⁷ are

A) Cr and Ag.
B) Zr and Au.
C) Ti and Rh.
D) Ti and Pd.
E) Sc and Rh.

Question 6

Which of the following transition metals in the 3d series has the least variability in preferred oxidation number?

A) Mn
B) Cu
C) Cr
D) V
E) Sc

Question 7

Which of the following transition metals in the 3d series has the most variability in preferred oxidation number?

A) Mn
B) Cu
C) Cr
D) V
E) Sc

Question 8

The standard reduction potential for aqueous Ag⁺ is 0.80 V. This value of the reduction potential

A) means silver is easily oxidized.
B) means silver is a good reducing agent.
C) means Ag⁺ is a good oxidizing agent.
D) is why silver forms oxy-ions.
E) means Ag is easily reduced.

Question 9

Which transition metal compounds are most likely to found as pure elements?

A) Au, Ag, As
B) Au, Pt, Ir
C) Cu, Zn, Pt
D) Hg, Fe, Pt
E) Hg, Pt, Au

Question 10

Which is the chemical formula for the compound named hexamminecobalt(III) sulphate?

A) [Co(NH₃)₆][SO₄]
B) [Co(NH₃)₇][SO₄]
C) [Co(NH₃)₆]₂[SO₃]₃
D) [Co(NH₃)₆][SO₄]₂
E) [Co(NH₃)₆]₂[SO₄]₃

Question 11

What is the oxidation state of rhodium in pentaamminebromorhodium bromide, [Rh(NH₃)₅Br]Br₂?

A) 0
B) +1
C) +2
D) +3
E) -2

Question 12

The complex Fe(C₂O₄)₃^3- has one unpaired electron. What is the electron configuration of this complex?(If needed, use the following equation:Spectrochemical Series
I^- < Br^- < Cl^- < F^- < OH^- < H₂O< NH₃ < en < NO₂^- < CN^- < CO)

A) t_2g⁴e_g¹
B) t_2g⁵e_g¹
C) t_2g⁵
D) t_2g⁴e_g²
E) t_2g³e_g²

Question 13

Which of the following has the most unpaired electrons?(If needed, use the following equation:Spectrochemical Series
I^- < Br^- < Cl^- < F^- < OH^- < H₂O< NH₃ < en < NO₂^- < CN^- < CO)

A) [NiCl₄]^2-
B) [IrCl₆]^3-
C) [Cr(CN)₆]^3-
D) [Fe(NH₃)₆]²⁺
E) [Co(NH₃)₆]³⁺

Question 14

You have two samples, one contains [Cr(CN)₆]^3- and the second [CrF₆]^3-. One solution is yellow, the second is green and they were found to have absorbance maxima at 650 and 380 nm. Unfortunately, you forgot to annotate which sample was which. Based on your knowledge which of the below show the correct assignments?(If needed, use the following equation:Spectrochemical Series I^- < Br^- < Cl^- < F^- < OH^- < H₂O< NH₃ < en < NO₂^- < CN^- < CO)

A) [Cr(CN)₆]^3- : yellow, 650 nm; [CrF₆]^3- : green, 380 nm
B) [Cr(CN)₆]^3- : yellow, 380 nm; [CrF₆]^3- : green, 650 nm
C) [Cr(CN)₆]^3- : green, 650 nm; [CrF₆]^3- :yellow, 380 nm
D) [Cr(CN)₆]^3- : green, 380 nm; [CrF₆]^3- : yellow, 650 nm

Question 15

[Co(NH₃)₅NO₂]Cl₂ and [Co(NH₃)₅ONO]Cl₂ are examples of what type of isomer?(If needed, use the following equation:Spectrochemical Series
I^- < Br^- < Cl^- < F^- < OH^- < H₂O< NH₃ < en < NO₂^- < CN^- < CO)

A) coordination
B) optical
C) geometric
D) linkage
E) ionization

Question 16

The complexes Co(NH₃)₆³⁺ and Mo(CO)₆ are isoelectronic and diamagnetic. The first complex is orange and the second complex is white. What can you deduce about the value of $\Delta$ in both of these complexes?(If needed, use the following equation:Spectrochemical Series
I^- < Br^- < Cl^- < F^- < OH^- < H₂O< NH₃ < en < NO₂^- < CN^- < CO)

A) $\Delta$ is larger in Mo(CO)₆ than in Co(NH₃)₆³⁺
B) $\Delta$ is 0 in Mo(CO)₆
C) $\Delta$ is smaller in Mo(CO)₆ than in Co(NH₃)₆³⁺
D) $\Delta$ is the same in the two complexes
E) $\Delta$ is 0 in Co(NH₃)₆³⁺

Question 17

What differences might you expect between the two complexes,
Fe(CN)₆^4- and FeF₆^4-?(If needed, use the following equation:Spectrochemical Series I^- < Br^- < Cl^- < F^- < OH^- < H₂O< NH₃ < en < NO₂^- < CN^- < CO)

A) Fe(CN)₆^4- will be pale yellow and paramagnetic and FeF₆^4- will be coloured and diamagnetic.
B) Fe(CN)₆^4- will be pale yellow and diamagnetic and FeF₆^4- will be coloured and paramagnetic.
C) Fe(CN)₆^4- will be coloured and paramagnetic and FeF₆^4- will be pale yellow and diamagnetic.
D) Fe(CN)₆^4- will be coloured and diamagnetic and FeF₆^4- will be pale yellow and paramagnetic.
E) Fe(CN)₆^4- will be coloured and paramagnetic and FeF₆^4- will be coloured and paramagnetic.

Question 18

Aqueous copper(I) chloride is nearly colourless whereas aqueous copper(II) chloride is blue in colour. This difference is because(If needed, use the following equation:Spectrochemical Series
I^- < Br^- < Cl^- < F^- < OH^- < H₂O< NH₃ < en < NO₂^- < CN^- < CO)

A) the crystal field splitting in copper(I) is much larger than that in copper(II).
B) the crystal field splitting in copper(I) is much smaller than that in copper(II).
C) the electron configuration of copper(II) has all subshells filled.
D) the electron configuration of copper(I) has all subshells filled.
E) copper(I) chloride doesn't dissolve in water.

Question 19

Which of the following five complexes are paramagnetic with 2 unpaired electrons? (If needed, use the following equation:Spectrochemical Series
I^- < Br^- < Cl^- < F^- < OH^- < H₂O< NH₃ < en < NO₂^- < CN^- < CO)

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

Question 20

How many chloride ions, Cl^-, would you expect to find in a platinum complex described as PtCl₄ . 5NH₃?(If needed, use the following equation:Spectrochemical Series
I^- < Br^- < Cl^- < F^- < OH^- < H₂O< NH₃ < en < NO₂^- < CN^- < CO)

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

Question 21

Arrange the following complexes in order of increasing orbital splitting enegy: [Co(NH₃)₆]³⁺, [Co(NH₃)₄]²⁺, [Co(NH₃)₆]²⁺.(If needed, use the following equation:Spectrochemical Series
I^- < Br^- < Cl^- < F^- < OH^- < H₂O< NH₃ < en < NO₂^- < CN^- < CO)

A) [Co(NH₃)₆]³⁺, [Co(NH₃)₄]²⁺, [Co(NH₃)₆]²⁺
B) [Co(NH₃)₆]³⁺, [Co(NH₃)₆]²⁺, [Co(NH₃)₄]²⁺
C) [Co(NH₃)₄]²⁺, [Co(NH₃)₆]²⁺,[Co(NH₃)₆]³⁺
D) [Co(NH₃)₆]²⁺, [Co(NH₃)₄]²⁺,[Co(NH₃)₆]³⁺
E) [Co(NH₃)₄]²⁺, [Co(NH₃)₆]³⁺,[Co(NH₃)₆]²⁺

Question 22

In which of the following complexes would you expect the pairing energy to be larger than the orbital splitting energy?(If needed, use the following equation:Spectrochemical Series
I^- < Br^- < Cl^- < F^- < OH^- < H₂O< NH₃ < en < NO₂^- < CN^- < CO)

A) FeCl₆^-4
B) Fe(CN)₆^-4
C) Fe(CN)₆^-3
D) W(CO)₆
E) Fe(CO)₆

Question 23

The three main functions of metalloproteins are

A) transport and storage agents, catalysts to biochemical reactions, and redox agents.
B) transport and storage agents, enzymes, and electrons sinks.
C) transport and storage agents, inhibitors to biochemical reactions, and electron sinks.
D) inhibitors to biochemical reactions, redox agents, and agents to accelerate chemical reactions.
E) inhibitors to chemical reactions, electron sources, and oxidizing agents.

Question 24

What is the oxidation state of iron in deoxyhaemoglobin and oxyhaemoglobin?

A) +2, +2
B) +3, +3
C) +2, +3
D) +3, +2

Question 25

Deoxyhaemoglobin is bluish in colour, oxyhaemoglobin is bright red. This indicates that the crystal field splitting is

A) greater in deoxyhaemoglobin since blue light is higher energy than red light.
B) greater in oxyhaemoglobin since red light is higher in energy than blue light.
C) greater in deoxyhaemoglobin since high energy blue light is absorbed.
D) greater in oxyhaemoglobin since high energy blue light is absorbed.
E) greater in deoxyhaemoglobin since low energy red light is absorbed.

Question 26

What are reasons that metals are used in metalloproteins?

A) They help position the reactant molecules to facilitate the reaction.
B) They inhibit electron transfer.
C) They enhance the structural instability of the enzyme.
D) They bind irreversibly to ligands.
E) They contain many thousands of atoms.

Question 27

What is at the active site for superoxide dismutase?

A) Cu⁺²
B) Zn⁺², Cu⁺²
C) Fe⁺³ cytochrome
D) FeS cubane
E) Fe hemoglobin

Question 28

Which of the techniques in production of metals takes advantage of different redox properties?

A) roasting
B) leaching
C) refining
D) conversion
E) flotation

Question 29

Which of the techniques in production of metals takes advantage of different solubilities?

A) roasting
B) leaching
C) flotation
D) conversion
E) smelting

Question 30

What is the layer above molten iron in a blast furnace called?

A) pig iron
B) water
C) impure oxides
D) slag
E) calcium carbonate

Question 31

What process must be applied to ilmenite ore (FeTiO₃) before it can be converted to titanium metal?

A) reaction with CO
B) reaction with CaO
C) reaction with HCl
D) reaction with Cl₂ and C
E) reaction with HNO₃

Question 32

Which of the following groups has primary use as catalysts?

A) group 4 metals (titanium family)
B) group 6 metals
C) the platinum metals
D) the group 11 metals
E) group 12 metals

Question 33

Which of the metals is most likely to be found in elemental form in nature?

A) group 4 metals (titanium family)
B) group 6 metals
C) the platinum metals
D) the group 11 metals
E) group 12 metals

Question 34

Which metal is primarily used in the photographic industry?

A) silver
B) copper
C) iron
D) silicon
E) cobalt

Question 35

The metals of which group are most often used in batteries?

A) group 4 metals (titanium family)
B) group 6 metals
C) platinum
D) group 11 metals
E) group 12 metals

Question 36

What is the material just one reaction away from chromium metal?

A) Na₂CO₃
B) FeCrO₄
C) Cr₂O₃
D) Na₂Cr₂O₇
E) Cr³⁺

Question 37

Titanium is used in many specialized engineering applications. Which of the following is characteristic of titanium?

A) high strength to weight ratio
B) ease of oxidation
C) high density
D) ease of fabrication
E) availability

Question 38

Which metals were discovered first?

A) group 4
B) group 6
C) group 9
D) group 10
E) group 11