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

Choose the INCORRECT statement about boron.

Accepted Answer

A)  Boron is the only nonmetal in group 13 (3
A)  
B)  Many boron compounds are electron deficient 
C)  Borax actually contains no boron 
D)  Diborane B2H6 has three center-two atom bonds 
E)  The best formula for boric acid is B(OH)3 
A)  Boron is the only nonmetal in group 13 (3
A)  
B)  Many boron compounds are electron deficient 
C)  Borax actually contains no boron 
D)  Diborane B2H6 has three center-two atom bonds 
E)  The best formula for boric acid is B(OH)3

Question 3

Strontium hydroxide is classified as "basic."

Accepted Answer

A) True 
 B)False

Question 4

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 5

The atomic radius of calcium is smaller than that of strontium.

Accepted Answer

A) True 
 B)False

Question 6

Choose the INCORRECT statement about the alkaline earth metals.

Accepted Answer

A)  The heavier Group 2 (2
A)  metals are nearly as active as the Group 1 (1
A)  metals. 
B)  They are the Group 1 (1
A)  family. 
C)  Magnesium metal is produced by the Dow process. 
D)  Salts of Sr and Ba provide vivid colors for pyrotechnic displays. 
E)  The source of magnesium is seawater and natural brines. 
A)  The heavier Group 2 (2
A)  metals are nearly as active as the Group 1 (1
A)  metals. 
B)  They are the Group 1 (1
A)  family. 
C)  Magnesium metal is produced by the Dow process. 
D)  Salts of Sr and Ba provide vivid colors for pyrotechnic displays. 
E)  The source of magnesium is seawater and natural brines.

Question 7

The Ka for boric acid is 5.6 × 10-10. What is the pH for 0.10 sodium borate?

Accepted Answer

A)  8.87 
B)  5.13 
C)  5.75 
D)  2.87 
E)  11.13 
A)  8.87 
B)  5.13 
C)  5.75 
D)  2.87 
E)  11.13

Question 8

Choose the INCORRECT statement.

Accepted Answer

A)  The diagonal relationship is the similarity of properties of the top element of one group to the second element of the next group. 
B)  Li - Mg is a diagonal relationship. 
C)  C - P is a diagonal relationship. 
D)  Be - Al is a diagonal relationship. 
E)  B - Si is a diagonal relationship. 
A)  The diagonal relationship is the similarity of properties of the top element of one group to the second element of the next group. 
B)  Li - Mg is a diagonal relationship. 
C)  C - P is a diagonal relationship. 
D)  Be - Al is a diagonal relationship. 
E)  B - Si is a diagonal relationship.

Question 9

Bronze is 90% Cu and 10% Sn by mass. What is the density of bronze if the density of Cu is 8.95 g/cm3 and the density of Sn is 5.77 g/cm3?

Accepted Answer

A)  7.36 
B)  6.07 
C)  8.06 
D)  14.72 
E)  8.63 
A)  7.36 
B)  6.07 
C)  8.06 
D)  14.72 
E)  8.63

Question 10

The production of lead is a two step process: 
2 PbS(s) + 3 O2(g)   2 PbO(s) + 2 SO2(g)
2 PbO(s) + C(s)   2 Pb(l) + CO2(g)
How much ore that is 5.2% PbS is necessary to produce 12.0 kg of Pb?

Accepted Answer

A)  0.721 kg 
B)  200 kg 
C)  2.67 kg 
D)  133 kg 
E)  267 kg 
A)  0.721 kg 
B)  200 kg 
C)  2.67 kg 
D)  133 kg 
E)  267 kg

Question 11

In diborane, B2H6, the hybridization of each boron is:

Accepted Answer

A)  sp3 
B)  sp2 
C)  sp3d 
D)  sp 
A)  sp3 
B)  sp2 
C)  sp3d 
D)  sp

Question 12

Choose the INCORRECT statement about the inert-pair effect.

Accepted Answer

A)  It explains why gallium tends to have the +3 oxidation state but thallium is most often in the +1 state. 
B)  It can be explained that the bond energies and lattice energies associated with the atoms and ions at the bottom of the groups are not sufficiently large to off-set the ionization energies of the ns2 electron. 
C)  The effect is manifested by ions not losing the outermost pair of electrons. 
D)  Of the group 14 (4
A)  metals, only tin exhibits the inert-pair effect. 
E)  For any group, the inert pair effect is more prominent as the period number increases. 
A)  It explains why gallium tends to have the +3 oxidation state but thallium is most often in the +1 state. 
B)  It can be explained that the bond energies and lattice energies associated with the atoms and ions at the bottom of the groups are not sufficiently large to off-set the ionization energies of the ns2 electron. 
C)  The effect is manifested by ions not losing the outermost pair of electrons. 
D)  Of the group 14 (4
A)  metals, only tin exhibits the inert-pair effect. 
E)  For any group, the inert pair effect is more prominent as the period number increases.

Question 13

Choose the INCORRECT statement.

Accepted Answer

A)  Elemental silicon is produced by reduction of SiO2 with coke. 
B)  In silica each silicon atom is bonded directly to four other silicon atoms. 
C)  Coke is made by heating coal in the absence of air. 
D)  Charcoal is made by heating wood in the absence of air. 
E)  Allotropes of carbon include diamond, graphite, fullerenes and nanotubes. 
A)  Elemental silicon is produced by reduction of SiO2 with coke. 
B)  In silica each silicon atom is bonded directly to four other silicon atoms. 
C)  Coke is made by heating coal in the absence of air. 
D)  Charcoal is made by heating wood in the absence of air. 
E)  Allotropes of carbon include diamond, graphite, fullerenes and nanotubes.

Question 14

Choose the INCORRECT statement.

Accepted Answer

A)  Sodium bicarbonate is sodium hydrogen carbonate. 
B)  O22- occurs in a peroxide. 
C)  O2- occurs in a superoxide. 
D)  The hydroxides of alkali metals are amphoteric. 
E)  Alkali metal hydroxides can be used to make soaps and detergents. 
A)  Sodium bicarbonate is sodium hydrogen carbonate. 
B)  O22- occurs in a peroxide. 
C)  O2- occurs in a superoxide. 
D)  The hydroxides of alkali metals are amphoteric. 
E)  Alkali metal hydroxides can be used to make soaps and detergents.

Question 15

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 16

A sample of water has hardness expressed as 81 ppm Ca2+. The sample is passed through an ion exchange column and the Ca2+ ions are replaced by H+ ions. What is the pH of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

Accepted Answer

A)  2.50 
B)  1.10 
C)  0.79 
D)  2.39 
E)  2.70 
A)  2.50 
B)  1.10 
C)  0.79 
D)  2.39 
E)  2.70

Question 17

Which of the following is a weak acid?

Accepted Answer

A)  B(OH)3 
B)  HI 
C)  B(OH)4- 
D)  B2(O2)2(OH)42- 
A)  B(OH)3 
B)  HI 
C)  B(OH)4- 
D)  B2(O2)2(OH)42-

Question 18

Pick the nonmetal in Group 13 (3A).

Accepted Answer

A)  Al 
B)  Ga 
C)  In 
D)  B 
E)  Tl 
A)  Al 
B)  Ga 
C)  In 
D)  B 
E)  Tl

Question 19

Which of the following is INCORRECT? A reaction typical for an alkali metal (M) is:

Accepted Answer

A)  M2O + H2O → 2 MOH 
B)  M + X2 → MX2 (X = halogen) 
C)  2 M + 2 NH3 → 2 MNH2 + H2 
D)  2 M + O2 → M2O2 
E)  2 M + H2 → 2 MH 
A)  M2O + H2O → 2 MOH 
B)  M + X2 → MX2 (X = halogen) 
C)  2 M + 2 NH3 → 2 MNH2 + H2 
D)  2 M + O2 → M2O2 
E)  2 M + H2 → 2 MH

Question 20

The difference between temporary hard water and permanent hard water is that only the former contains a significant concentration of:

Accepted Answer

A)  Ca2+ 
B)  CO32- 
C)  HCO3- 
D)  Mg2+ 
E)  OH- 
A)  Ca2+ 
B)  CO32- 
C)  HCO3- 
D)  Mg2+ 
E)  OH-

Exam 21: Main Group Elements I: Groups 1, 2, 13, and 14

Choose the INCORRECT statement.

Choose the INCORRECT statement about boron.

Strontium hydroxide is classified as "basic."

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

The atomic radius of calcium is smaller than that of strontium.

Choose the INCORRECT statement about the alkaline earth metals.

The Ka for boric acid is 5.6 × 10-10. What is the pH for 0.10 sodium borate?

Choose the INCORRECT statement.

Bronze is 90% Cu and 10% Sn by mass. What is the density of bronze if the density of Cu is 8.95 g/cm3 and the density of Sn is 5.77 g/cm3?

The production of lead is a two step process: 2 PbS(s) + 3 O2(g) 2 PbO(s) + 2 SO2(g) 2 PbO(s) + C(s) 2 Pb(l) + CO2(g) How much ore that is 5.2% PbS is necessary to produce 12.0 kg of Pb?

In diborane, B2H6, the hybridization of each boron is:

Choose the INCORRECT statement about the inert-pair effect.

Choose the INCORRECT statement.

Choose the INCORRECT statement.

The molecular geometry for CO2 is ________.

A sample of water has hardness expressed as 81 ppm Ca2+. The sample is passed through an ion exchange column and the Ca2+ ions are replaced by H+ ions. What is the pH of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)

Which of the following is a weak acid?

Pick the nonmetal in Group 13 (3A).

Which of the following is INCORRECT? A reaction typical for an alkali metal (M) is:

The difference between temporary hard water and permanent hard water is that only the former contains a significant concentration of:

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: Additional Aspects

Intermolecular Forces: Liquids and Solids

Solutions and Their Physical Properties

Chemical Kinetics

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Spontaneous Change: Entropy and Free Energy

Electrochemistry

Main Group Elements II: Groups 18, 17, 16, 15, and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry 1-41

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

The Ka for boric acid is 5.6 × 10^-10. What is the pH for 0.10 sodium borate?

The production of lead is a two step process: 2 PbS(s) + 3 O₂(g) 2 PbO(s) + 2 SO₂(g) 2 PbO(s) + C(s) 2 Pb(l) + CO₂(g) How much ore that is 5.2% PbS is necessary to produce 12.0 kg of Pb?

In diborane, B₂H₆, the hybridization of each boron is:

The molecular geometry for CO₂ is ________.

A sample of water has hardness expressed as 81 ppm Ca²⁺. The sample is passed through an ion exchange column and the Ca²⁺ ions are replaced by H⁺ ions. What is the pH of the water after it has been treated? (1 ppm = 1 g solute/106 g solution)