Question 1

Choose the INCORRECT statement.

Accepted Answer

A) Group 2 (2
A) compounds are less soluble than Group 1 (1
A) compounds. 
B) Group 2 (2
A) compounds often form hydrates. 
C) Hydrates are compounds that have water molecules bonded to them. 
D) Group 2 (2
A) elements react with halogens to form metal halides. 
E) Limestone is CaCl2. 
A) Group 2 (2
A) compounds are less soluble than Group 1 (1
A) compounds. 
B) Group 2 (2
A) compounds often form hydrates. 
C) Hydrates are compounds that have water molecules bonded to them. 
D) Group 2 (2
A) elements react with halogens to form metal halides. 
E) Limestone is CaCl2.

Question 2

Complete the following reaction:
B(OH)3(aq)+ 2 H2O(l)→

Accepted Answer

A) B ∙ H2O + O2 + H3O+  
B) HBO32- + 2 H3O+  
C) B + H2 + 5 OH-  
D) H3O+ + B(OH)4-  
E) 2 H3O+ + HBO3  
A) B ∙ H2O + O2 + H3O+  
B) HBO32- + 2 H3O+  
C) B + H2 + 5 OH-  
D) H3O+ + B(OH)4-  
E) 2 H3O+ + HBO3

Question 3

Which of the following is uncharacteristic of the alkali metals?

Accepted Answer

A) low ionization energy 
B) low electronegativity 
C) large negative electrode potential 
D) two electrons in the valence shell 
E) produce colored flames when heated 
A) low ionization energy 
B) low electronegativity 
C) large negative electrode potential 
D) two electrons in the valence shell 
E) produce colored flames when heated

Question 4

A sample of water has hardness expressed as 1.6 × 102 ppm Ca2+(aq).The sample is passed through an ion exchange column and the Ca2+(aq)ions are replaced by H+(aq)ions.What is the pH of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

Accepted Answer

A) 2.09 
B) -0.80 
C) 1.10 
D) 7.00 
E) 2.40 
A) 2.09 
B) -0.80 
C) 1.10 
D) 7.00 
E) 2.40

Question 5

Sodium will most readily form which of the following compounds?

Accepted Answer

A) Na3As 
B) Na3P 
C) NaCl 
D) Na4P 
E) As3Na 
A) Na3As 
B) Na3P 
C) NaCl 
D) Na4P 
E) As3Na

Question 6

The molecular geometry for CO2 is ________.

Accepted Answer

A) trigonal planar 
B) trigonal bipyramid 
C) bent 
D) linear 
E) trigonal pyramidal 
A) trigonal planar 
B) trigonal bipyramid 
C) bent 
D) linear 
E) trigonal pyramidal

Question 7

At the start of 1980,the average lead content in blood had dropped to about 10 μg/dL blood.How many mg is that in 2.0 gallons of blood? (1 gallon = 3.7854 L)

Accepted Answer

A) 760 mg 
B) 0.80 mg 
C) 0.76 mg 
D) 0.20 mg 
E) 80 mg 
A) 760 mg 
B) 0.80 mg 
C) 0.76 mg 
D) 0.20 mg 
E) 80 mg

Question 8

The chemistry of Be is different from that of the other group 2 metals due to the small size of Be2+.

Accepted Answer

A) True 
 B)False

Question 9

Quartz and mica are examples of:

Accepted Answer

A) silanols 
B) silanes 
C) silicones 
D) silicates 
E) isomers 
A) silanols 
B) silanes 
C) silicones 
D) silicates 
E) isomers

Question 10

What average current must be maintained for a tin plating operation forming 2.4 kg of tin per hour from a solution of a tin(IV)complex,at an electrode efficiency of 90.0%?

Accepted Answer

A) 750 A 
B) 1,000 A 
C) 1,600 A 
D) 2,400 A 
E) 3,000 A 
A) 750 A 
B) 1,000 A 
C) 1,600 A 
D) 2,400 A 
E) 3,000 A

Question 11

When sodium and potassium react with excess oxygen,the major products are:

Accepted Answer

A) Na2O2 and KO2 
B) NaO2 and KO2 
C) Na2O and KO2 
D) Na2O2 and K2O2 
E) NaO2 and K2O2 
A) Na2O2 and KO2 
B) NaO2 and KO2 
C) Na2O and KO2 
D) Na2O2 and K2O2 
E) NaO2 and K2O2

Question 12

A sample of water has hardness expressed as 185 ppm Ca2+(aq).The sample is passed through an ion exchange column and the Ca2+(aq)ions are replaced by Na+(aq)ions.What is the [Na+] in ppm of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

Accepted Answer

A) 104 ppm 
B) 212 ppm 
C) 370 ppm 
D) 92.5 ppm 
E) 52.0 ppm 
A) 104 ppm 
B) 212 ppm 
C) 370 ppm 
D) 92.5 ppm 
E) 52.0 ppm

Question 13

Choose the molecular shape for BCl3.

Accepted Answer

A) trigonal planar 
B) tetrahedral 
C) bent 
D) linear 
E) trigonal pyramidal 
A) trigonal planar 
B) tetrahedral 
C) bent 
D) linear 
E) trigonal pyramidal

Question 14

Choose the INCORRECT statement.

Accepted Answer

A) A glass is an amorphous solid. 
B) An amorphous solid has order over relatively short distances. 
C) A sol is a colloidal dispersion of particles in a liquid. 
D) Silicones are materials consisting of molecules with long silicon-oxygen chains. 
E) Silicates are silicon-hydrogen containing compounds. 
A) A glass is an amorphous solid. 
B) An amorphous solid has order over relatively short distances. 
C) A sol is a colloidal dispersion of particles in a liquid. 
D) Silicones are materials consisting of molecules with long silicon-oxygen chains. 
E) Silicates are silicon-hydrogen containing compounds.

Question 15

Write the equation for the production of potassium metal from potassium chloride.

Accepted Answer

A) KCl(s)+ Na(s)   NaCl(s)+ K(s) 
B) KCl(s)+ Na(s)   KNaCl(s) 
C) KCl(l)+ Na(l)   NaCl(l)+ K(g) 
D) KCl(l)+ Na(g)   NaCl(s)+ K(s) 
E) There is no reaction. 
A) KCl(s)+ Na(s)   NaCl(s)+ K(s) 
B) KCl(s)+ Na(s)   KNaCl(s) 
C) KCl(l)+ Na(l)   NaCl(l)+ K(g) 
D) KCl(l)+ Na(g)   NaCl(s)+ K(s) 
E) There is no reaction.

Question 16

Choose the INCORRECT statement about silicon.

Accepted Answer

A) Silicon forms on stable oxide. 
B) Silicon exhibits more catenation than carbon. 
C) Sand and quartz are SiO2. 
D) The central feature of silicates is the SiO44- tetrahedron. 
E) A silicone is a compound with an alternating silicon and oxygen chain as a backbone with carbon containing groups as sidechains. 
A) Silicon forms on stable oxide. 
B) Silicon exhibits more catenation than carbon. 
C) Sand and quartz are SiO2. 
D) The central feature of silicates is the SiO44- tetrahedron. 
E) A silicone is a compound with an alternating silicon and oxygen chain as a backbone with carbon containing groups as sidechains.

Question 17

Lithium differs from other members of the group 1 (1A)elements in which way?

Accepted Answer

A) It does not react with water under any conditions. 
B) It forms a nitride. 
C) Its hydroxide is very soluble. 
D) It is a rather soft metal. 
E) It is a good reducing agent. 
A) It does not react with water under any conditions. 
B) It forms a nitride. 
C) Its hydroxide is very soluble. 
D) It is a rather soft metal. 
E) It is a good reducing agent.

Question 18

Write the chemical equation for the reaction of potassium superoxide with carbon dioxide to produce oxygen.

Accepted Answer

A) KO(s)+ CO2(g)→ O2(g)+ K(s)+ CO(g) 
B) K2O(s)+ CO2(g)→ O2(g)+ K(s)+ KCO(s) 
C) KO2 + CO2(g)→ 2 O2(g)+ KC(s) 
D) 2 KO2(s)+ 2 CO2(g)→ K2CO3(s)+ O2(g) 
E) There is no reaction. 
A) KO(s)+ CO2(g)→ O2(g)+ K(s)+ CO(g) 
B) K2O(s)+ CO2(g)→ O2(g)+ K(s)+ KCO(s) 
C) KO2 + CO2(g)→ 2 O2(g)+ KC(s) 
D) 2 KO2(s)+ 2 CO2(g)→ K2CO3(s)+ O2(g) 
E) There is no reaction.

Question 19

Both gypsum and plaster of Paris contain the same compound,but in different stages of hydration.That compound is:

Accepted Answer

A) BaSO4  
B) BaCO3  
C) CaSO4  
D) CaCO3  
E) KAl(SO4)2  
A) BaSO4  
B) BaCO3  
C) CaSO4  
D) CaCO3  
E) KAl(SO4)2

Question 20

Which oxidation state is uncommon for a given element?

Accepted Answer

A) Al/1+ 
B) Ga/3+ 
C) Al/3+ 
D) In/3+ 
E) In/1+ 
A) Al/1+ 
B) Ga/3+ 
C) Al/3+ 
D) In/3+ 
E) In/1+

Exam 21: Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Choose the INCORRECT statement.

Complete the following reaction: B(OH)3(aq)+ 2 H2O(l)→

Which of the following is uncharacteristic of the alkali metals?

A sample of water has hardness expressed as 1.6 × 102 ppm Ca2+(aq).The sample is passed through an ion exchange column and the Ca2+(aq)ions are replaced by H+(aq)ions.What is the pH of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

Sodium will most readily form which of the following compounds?

The molecular geometry for CO2 is ________.

At the start of 1980,the average lead content in blood had dropped to about 10 μg/dL blood.How many mg is that in 2.0 gallons of blood? (1 gallon = 3.7854 L)

The chemistry of Be is different from that of the other group 2 metals due to the small size of Be2+.

Quartz and mica are examples of:

What average current must be maintained for a tin plating operation forming 2.4 kg of tin per hour from a solution of a tin(IV)complex,at an electrode efficiency of 90.0%?

When sodium and potassium react with excess oxygen,the major products are:

A sample of water has hardness expressed as 185 ppm Ca2+(aq).The sample is passed through an ion exchange column and the Ca2+(aq)ions are replaced by Na+(aq)ions.What is the [Na+] in ppm of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

Choose the molecular shape for BCl3.

Choose the INCORRECT statement.

Write the equation for the production of potassium metal from potassium chloride.

Choose the INCORRECT statement about silicon.

Lithium differs from other members of the group 1 (1A)elements in which way?

Write the chemical equation for the reaction of potassium superoxide with carbon dioxide to produce oxygen.

Both gypsum and plaster of Paris contain the same compound,but in different stages of hydration.That compound is:

Which oxidation state is uncommon for a given element?

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

Complete the following reaction: B(OH)₃(aq)+ 2 H₂O(l)→

A sample of water has hardness expressed as 1.6 × 10² ppm Ca²⁺(aq).The sample is passed through an ion exchange column and the Ca²⁺(aq)ions are replaced by H⁺(aq)ions.What is the pH of the water after it has been treated? (1 ppm = 1 g solute/10⁶ g solution)

The molecular geometry for CO₂ is ________.

The chemistry of Be is different from that of the other group 2 metals due to the small size of Be²⁺.

A sample of water has hardness expressed as 185 ppm Ca²⁺(aq).The sample is passed through an ion exchange column and the Ca²⁺(aq)ions are replaced by Na⁺(aq)ions.What is the [Na⁺] in ppm of the water after it has been treated? (1 ppm = 1 g solute/10⁶ g solution)

Choose the molecular shape for BCl₃.