Question 1

Metal oxides generally form an acidic solution in water.

Accepted Answer

A) True 
 B)False

Question 2

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 3

Strontium hydroxide is more soluble in water than is calcium hydroxide.

Accepted Answer

A) True 
 B)False

Question 4

If in a lead storage battery the reaction at the cathode is:
 PbO2(s)+ 4 H+(aq)+ SO42- (aq)+ 2 e- → PbSO4(s)+ 2 H2O(l)
How many grams of lead sulfate are formed on one plate if 20.A average current occurs for 2.0 minutes? Assume 100% efficiency.

Accepted Answer

A) 0.063 g 
B) 0.13 g 
C) 3.8 g 
D) 7.5 g 
E) requires additional information 
A) 0.063 g 
B) 0.13 g 
C) 3.8 g 
D) 7.5 g 
E) requires additional information

Question 5

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 6

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 7

Water treatment using a cation-exchange resin in the H+ form,followed by an anion-exchange resin in the OH- form,unlike the processes using typical zeolites or synthetic resins regenerated by sodium chloride,can produce:

Accepted Answer

A) brine water 
B) deionized water 
C) distilled water 
D) hard water 
E) soft water 
A) brine water 
B) deionized water 
C) distilled water 
D) hard water 
E) soft water

Question 8

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 9

What potential would be expected from a galvanic cell using a solid magnesium/0.20 M Mg2+(aq)half-cell with a solid thallium/0.010 M Tl+(aq)half-cell [for Mg2+(aq)+ 2 e- = Mg(s),E° = -2.36 V;for Tl+(aq)+ e- = Tl(s),E° = -0.34 V]?

Accepted Answer

A) 3.04 V 
B) 1.92 V 
C) 1.68 V 
D) 2.70 V 
E) 2.02 V 
A) 3.04 V 
B) 1.92 V 
C) 1.68 V 
D) 2.70 V 
E) 2.02 V

Question 10

What mass of potassium superoxide could be prepared from 15.6 g of potassium metal and excess oxygen?

Accepted Answer

A) 37.6 g 
B) 15.6 g 
C) 22.0 g 
D) 28.4 g 
E) 0.399 g 
A) 37.6 g 
B) 15.6 g 
C) 22.0 g 
D) 28.4 g 
E) 0.399 g

Question 11

Choose the INCORRECT statement.

Accepted Answer

A) Sodium chloride may be produced by electrolysis of sodium metal and chlorine gas. 
B) Sodium chloride is one of the most used minerals in the production of chemicals. 
C) Sodium chloride is used to preserve meat and fish. 
D) Sodium chloride is used to control ice on roads. 
E) Sodium chloride is used to regenerate water softeners. 
A) Sodium chloride may be produced by electrolysis of sodium metal and chlorine gas. 
B) Sodium chloride is one of the most used minerals in the production of chemicals. 
C) Sodium chloride is used to preserve meat and fish. 
D) Sodium chloride is used to control ice on roads. 
E) Sodium chloride is used to regenerate water softeners.

Question 12

The Ka for boric acid is 5.6 × 10-10.What is the pH for 0.10 M 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 13

The acidity of the group 3 oxides ________ (increases,decreases,does not change)moving down the group.

Accepted Answer

The answer of The acidity of the group 3 oxides...

Question 14

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 15

Which incorrectly shows the main product of reaction of the indicated alkali metal with excess oxygen?

Accepted Answer

A) Li/Li2O 
B) Na/Na2O2  
C) K/K2O2  
D) Rb/RbO2  
E) Cs/CsO2  
A) Li/Li2O 
B) Na/Na2O2  
C) K/K2O2  
D) Rb/RbO2  
E) Cs/CsO2

Question 16

Which of the following elements forms a +4 oxidation state that is more stable than its +2 oxidation state,and is also found as a significant component of commercial bronze,pewter,red brass,and most solders?

Accepted Answer

A) zinc 
B) tin 
C) magnesium 
D) lead 
E) carbon 
A) zinc 
B) tin 
C) magnesium 
D) lead 
E) carbon

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

Metal oxides generally form an acidic solution in water.

Choose the INCORRECT statement.

Strontium hydroxide is more soluble in water than is calcium hydroxide.

If in a lead storage battery the reaction at the cathode is: PbO2(s)+ 4 H+(aq)+ SO42- (aq)+ 2 e- → PbSO4(s)+ 2 H2O(l) How many grams of lead sulfate are formed on one plate if 20.A average current occurs for 2.0 minutes? Assume 100% efficiency.

Choose the INCORRECT statement.

Choose the INCORRECT statement about boron.

Water treatment using a cation-exchange resin in the H+ form,followed by an anion-exchange resin in the OH- form,unlike the processes using typical zeolites or synthetic resins regenerated by sodium chloride,can produce:

Choose the INCORRECT statement about the alkaline earth metals.

What potential would be expected from a galvanic cell using a solid magnesium/0.20 M Mg2+(aq)half-cell with a solid thallium/0.010 M Tl+(aq)half-cell [for Mg2+(aq)+ 2 e- = Mg(s),E° = -2.36 V;for Tl+(aq)+ e- = Tl(s),E° = -0.34 V]?

What mass of potassium superoxide could be prepared from 15.6 g of potassium metal and excess oxygen?

Choose the INCORRECT statement.

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

The acidity of the group 3 oxides ________ (increases,decreases,does not change)moving down the group.

Choose the INCORRECT statement about the inert-pair effect.

Which incorrectly shows the main product of reaction of the indicated alkali metal with excess oxygen?

Which of the following elements forms a +4 oxidation state that is more stable than its +2 oxidation state,and is also found as a significant component of commercial bronze,pewter,red brass,and most solders?

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

If in a lead storage battery the reaction at the cathode is: PbO₂(s)+ 4 H⁺(aq)+ SO₄^2- (aq)+ 2 e^- → PbSO₄(s)+ 2 H₂O(l) How many grams of lead sulfate are formed on one plate if 20.A average current occurs for 2.0 minutes? Assume 100% efficiency.

Water treatment using a cation-exchange resin in the H⁺ form,followed by an anion-exchange resin in the OH^- form,unlike the processes using typical zeolites or synthetic resins regenerated by sodium chloride,can produce:

What potential would be expected from a galvanic cell using a solid magnesium/0.20 M Mg²⁺(aq)half-cell with a solid thallium/0.010 M Tl⁺(aq)half-cell [for Mg²⁺(aq)+ 2 e^- = Mg(s),E° = -2.36 V;for Tl⁺(aq)+ e^- = Tl(s),E° = -0.34 V]?

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