Question 1

The lanthanide contraction results because

Accepted Answer

A) the shielding effect of the d-electrons is less than that of the f-electrons. 
B) the shielding effect of the d-electrons is greater than that of the f-electrons. 
C) of the poor shielding effect of the f-electrons and the higher nuclear charge. 
D) the d-electrons shield the f-electrons from the nucleus. 
E) f-electrons interact more strongly with each other than d-electrons. 
A) the shielding effect of the d-electrons is less than that of the f-electrons. 
B) the shielding effect of the d-electrons is greater than that of the f-electrons. 
C) of the poor shielding effect of the f-electrons and the higher nuclear charge. 
D) the d-electrons shield the f-electrons from the nucleus. 
E) f-electrons interact more strongly with each other than d-electrons.

Question 2

Which of the following is likely to be a good reducing agent?

Accepted Answer

A) Cr2O72F1F1F1S1F1F1F10  
B) MnO4F1F1F1S1F1F1F10  
C) Cr2+  
D) MnO2  
E) Cr2O3  
A) Cr2O72F1F1F1S1F1F1F10  
B) MnO4F1F1F1S1F1F1F10  
C) Cr2+  
D) MnO2  
E) Cr2O3

Question 3

The complex ion [Cr(OH2)6]2+ has four unpaired electrons.This means that

Accepted Answer

A) the complex is high-spin. 
B) the complex is diamagnetic. 
C) the water ligands are difficult to remove. 
D) the complex is low-spin. 
E) (F1F1F1S1F1F1F10o is very large.) 
A) the complex is high-spin. 
B) the complex is diamagnetic. 
C) the water ligands are difficult to remove. 
D) the complex is low-spin. 
E) (F1F1F1S1F1F1F10o is very large.)

Question 4

One mole of pentaamminechlorocobalt(III)chloride dissolves in water to give _____ moles of ions.

Accepted Answer

The answer of One mole of pentaamminechlorocobalt(III)chloride dissolves in water...

Question 5

The atomic radii of the Period 6 d-metals are

Accepted Answer

A) smaller than expected, and about the same as the Period 5 d-metals. 
B) about the same as the lanthanides. 
C) larger than the atomic radii of the Period 5 d-metals. 
D) about the same as the Period 4 d-metals. 
E) large because of the lanthanide contraction. 
A) smaller than expected, and about the same as the Period 5 d-metals. 
B) about the same as the lanthanides. 
C) larger than the atomic radii of the Period 5 d-metals. 
D) about the same as the Period 4 d-metals. 
E) large because of the lanthanide contraction.

Question 6

What is the oxidation number of cobalt in [CoCl(NH3)5]Cl2?

Accepted Answer

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

Question 7

A ligand is

Accepted Answer

A) a Lewis base. 
B) necessary in a complex to balance the charge on the metal ion. 
C) used to force octahedral geometry on a metal ion. 
D) a Lewis acid. 
E) used to precipitate metal ions from aqueous solution. 
A) a Lewis base. 
B) necessary in a complex to balance the charge on the metal ion. 
C) used to force octahedral geometry on a metal ion. 
D) a Lewis acid. 
E) used to precipitate metal ions from aqueous solution.

Question 8

Vanadium metal is produced by the

Accepted Answer

A) reduction of VOCl2(s)with magnesium. 
B) reduction of vanadium(V)oxide with calcium. 
C) reaction of V2O5(s)with coke. 
D) decomposition of VCl4(g)at high temperature. 
E) roasting of VO2(s). 
A) reduction of VOCl2(s)with magnesium. 
B) reduction of vanadium(V)oxide with calcium. 
C) reaction of V2O5(s)with coke. 
D) decomposition of VCl4(g)at high temperature. 
E) roasting of VO2(s).

Question 9

If AgNO3(aq)is added to a 1 M aqueous solution of pentaamminechlorocobalt(III)chloride,how many moles of silver chloride are precipitated?

Accepted Answer

Question 10

Why is F1F1F1S1F1F1F10T is always greater than F1F1F1S1F1F1F10O?

Accepted Answer

It isn't; F1F1F1S1F

Question 11

Consider the complexes fac- and mer-triaquatrichlororuthenium(III)chloride.Neither of these complexes is chiral.True or false?

Accepted Answer

A) True 
 B)False

Question 12

Which of the following complexes is likely to have an absorbance maximum at 305 nm?

Accepted Answer

A) Fe(CN)64F1F1F1S1F1F1F10 
B) Ti(OH2)63+ 
C) Fe(OH2)63+ 
D) Co(NH3)63+ 
A) Fe(CN)64F1F1F1S1F1F1F10 
B) Ti(OH2)63+ 
C) Fe(OH2)63+ 
D) Co(NH3)63+

Question 13

Which of the following complexes has the smallest d-orbital splitting energy?

Accepted Answer

A) Co(NH3)63+  
B) Co(NH3)5OH2+  
C) Co(NH3)5CN2+  
D) Co(NH3)5I2+  
E) Co(NH3)5(OH2)3+  
A) Co(NH3)63+  
B) Co(NH3)5OH2+  
C) Co(NH3)5CN2+  
D) Co(NH3)5I2+  
E) Co(NH3)5(OH2)3+

The lanthanide contraction results because

Which of the following is likely to be a good reducing agent?

The complex ion [Cr(OH₂)₆]²⁺ has four unpaired electrons.This means that

One mole of pentaamminechlorocobalt(III)chloride dissolves in water to give _____ moles of ions.

The atomic radii of the Period 6 d-metals are

What is the oxidation number of cobalt in [CoCl(NH₃)₅]Cl₂?

A ligand is

Vanadium metal is produced by the

If AgNO₃(aq)is added to a 1 M aqueous solution of pentaamminechlorocobalt(III)chloride,how many moles of silver chloride are precipitated?

Why is _T is always greater than _O?

Consider the complexes fac- and mer-triaquatrichlororuthenium(III)chloride.Neither of these complexes is chiral.True or false?

Which of the following complexes is likely to have an absorbance maximum at 305 nm?

Which of the following complexes has the smallest d-orbital splitting energy?

The Quantum World

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Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

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Thermodynamics: the Second and Third Laws

Physical Equilibria

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Exam 17: The Elements: the D Block

The lanthanide contraction results because

Which of the following is likely to be a good reducing agent?

The complex ion [Cr(OH2)6]2+ has four unpaired electrons.This means that

One mole of pentaamminechlorocobalt(III)chloride dissolves in water to give _____ moles of ions.

The atomic radii of the Period 6 d-metals are

What is the oxidation number of cobalt in [CoCl(NH3)5]Cl2?

A ligand is

Vanadium metal is produced by the

If AgNO3(aq)is added to a 1 M aqueous solution of pentaamminechlorocobalt(III)chloride,how many moles of silver chloride are precipitated?

Why is T is always greater than O?

Consider the complexes fac- and mer-triaquatrichlororuthenium(III)chloride.Neither of these complexes is chiral.True or false?

Which of the following complexes is likely to have an absorbance maximum at 305 nm?

Which of the following complexes has the smallest d-orbital splitting energy?

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

Liquids and Solids

Inorganic Materials

Thermodynamics: the First Law

Thermodynamics: the Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: the Main Group Elements

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

Filters

The complex ion [Cr(OH₂)₆]²⁺ has four unpaired electrons.This means that

What is the oxidation number of cobalt in [CoCl(NH₃)₅]Cl₂?

If AgNO₃(aq)is added to a 1 M aqueous solution of pentaamminechlorocobalt(III)chloride,how many moles of silver chloride are precipitated?

Why is _T is always greater than _O?