Question 1

The valence electrons in a metal crystal are

Accepted Answer

A) delocalized between every two atoms. 
B) localized between every two atoms. 
C) found only on the surface of the crystal. 
D) delocalized only by an applied potential. 
E) free to travel throughout the crystal. 
A) delocalized between every two atoms. 
B) localized between every two atoms. 
C) found only on the surface of the crystal. 
D) delocalized only by an applied potential. 
E) free to travel throughout the crystal. E

Question 2

The Goldschmidt process is a method to

Accepted Answer

A) produce lead from galena ore. 
B) prepare aluminum metal from electrolysis of aluminum hydroxide and cryolite. 
C) prepare sodium carbonate from sodium chloride and calcium carbonate. 
D) produce magnesium from seawater. 
E) prepare a metal by reduction of its oxide with aluminum metal. 
A) produce lead from galena ore. 
B) prepare aluminum metal from electrolysis of aluminum hydroxide and cryolite. 
C) prepare sodium carbonate from sodium chloride and calcium carbonate. 
D) produce magnesium from seawater. 
E) prepare a metal by reduction of its oxide with aluminum metal. E

Question 3

Which of the following reactions does not represent a commercial method for preparing hydrogen gas?

Accepted Answer

A) C3H8(g)+ 3H2O(g)→ 3CO(g)+ 7H2(g) 
B) C(s)+ H2O(g)→ CO(g)+ H2(g) 
C) 2NH3(g)→ N2(g)+ 3H2(g) 
D) 2H2O(l)→ 2H2(g)+ O2(g) 
E) CO(g)+ H2O(g)→ CO2(g)+ H2(g) 
A) C3H8(g)+ 3H2O(g)→ 3CO(g)+ 7H2(g) 
B) C(s)+ H2O(g)→ CO(g)+ H2(g) 
C) 2NH3(g)→ N2(g)+ 3H2(g) 
D) 2H2O(l)→ 2H2(g)+ O2(g) 
E) CO(g)+ H2O(g)→ CO2(g)+ H2(g) C

Question 4

Which of the following statements concerning magnesium is false?

Accepted Answer

A) Milk of magnesia is composed of a slurry of magnesium hydroxide. 
B) Combustion of magnesium produces an intense white light. 
C) Carbon dioxide may be used to put out magnesium fires. 
D) Magnesium hydroxide is relatively insoluble in water. 
E) Firebricks are a hardened form of magnesium oxide. 
A) Milk of magnesia is composed of a slurry of magnesium hydroxide. 
B) Combustion of magnesium produces an intense white light. 
C) Carbon dioxide may be used to put out magnesium fires. 
D) Magnesium hydroxide is relatively insoluble in water. 
E) Firebricks are a hardened form of magnesium oxide.

Question 5

Which of the following equations describes the reaction of copper metal with dilute nitric acid?

Accepted Answer

A) Cu(s)+ 4H3O+(aq)+ 2NO3-(aq)→ Cu2+(aq)+ 2NO2(g)+ 6H2O(l) 
B) 4Cu(s)+ 10H3O+(aq)+ 2NO3-(aq)→ 4Cu2+(aq)+ N2O(g)+ 15H2O(l) 
C) 5Cu(s)+ 12H3O+(aq)+ 2NO3-(aq)→ 5Cu2+(aq)+ N2(g)+ 18H2O(l) 
D) 4Cu(s)+ 10H3O+(aq)+ NO3-(aq)→ 4Cu2+(aq)+ NH4+(aq)+ 13H2O(l) 
E) 3Cu(s)+ 8H3O+(aq)+ 2NO3-(aq)→ 3Cu2+(aq)+ 2NO(g)+ 12H2O(l) 
A) Cu(s)+ 4H3O+(aq)+ 2NO3-(aq)→ Cu2+(aq)+ 2NO2(g)+ 6H2O(l) 
B) 4Cu(s)+ 10H3O+(aq)+ 2NO3-(aq)→ 4Cu2+(aq)+ N2O(g)+ 15H2O(l) 
C) 5Cu(s)+ 12H3O+(aq)+ 2NO3-(aq)→ 5Cu2+(aq)+ N2(g)+ 18H2O(l) 
D) 4Cu(s)+ 10H3O+(aq)+ NO3-(aq)→ 4Cu2+(aq)+ NH4+(aq)+ 13H2O(l) 
E) 3Cu(s)+ 8H3O+(aq)+ 2NO3-(aq)→ 3Cu2+(aq)+ 2NO(g)+ 12H2O(l)

Question 6

Which of the following is not an allotropic form of sulfur?

Accepted Answer

A) S10 
B) S6 
C) S2 
D) S4 
E) S8 
A) S10 
B) S6 
C) S2 
D) S4 
E) S8

Question 7

Which of the following reactions is a disproportionation?

Accepted Answer

A) CaSiO3(s)+ 8HCl(aq)→ H2SiCl6(aq)+ CaCl2(aq)+ 3H2O(l) 
B) Cl2(aq)+ 2I-(aq)→ I2(aq)+ 2Cl-(aq) 
C) HCl(aq)+ NaOH(aq)→ NaCl(aq)+ H2O(l) 
D) AgNO3(aq)+ NaCl(aq)→ AgCl(s)+ NaNO3(aq) 
E) Cl2(g)+ 2NaOH(aq)→ NaClO(aq)+ NaCl(aq)+ H2O(l) 
A) CaSiO3(s)+ 8HCl(aq)→ H2SiCl6(aq)+ CaCl2(aq)+ 3H2O(l) 
B) Cl2(aq)+ 2I-(aq)→ I2(aq)+ 2Cl-(aq) 
C) HCl(aq)+ NaOH(aq)→ NaCl(aq)+ H2O(l) 
D) AgNO3(aq)+ NaCl(aq)→ AgCl(s)+ NaNO3(aq) 
E) Cl2(g)+ 2NaOH(aq)→ NaClO(aq)+ NaCl(aq)+ H2O(l)

Question 8

Which of the following metals will have the most vigorous reaction with water?

Accepted Answer

A) Ga 
B) Li 
C) K 
D) Ca 
E) Ba 
A) Ga 
B) Li 
C) K 
D) Ca 
E) Ba

Question 9

Which of the following statements is true?

Accepted Answer

A) An alloy may also be an ore. 
B) A metal may also be a mineral. 
C) A mineral may also be an alloy. 
D) A mineral may also be an ore. 
E) All of these statements are true. 
A) An alloy may also be an ore. 
B) A metal may also be a mineral. 
C) A mineral may also be an alloy. 
D) A mineral may also be an ore. 
E) All of these statements are true.

Question 10

A solution may contain NaCl,MgCl2,and/or AlCl3.When sodium hydroxide is added,a white precipitate forms that dissolves as more NaOH is added.Therefore,

Accepted Answer

A) the solution definitely contains AlCl3 and cannot contain MgCl2. 
B) the solution contains only NaCl. 
C) the solution contains at least two of the compounds,but it cannot be determined which two are present. 
D) the solution definitely contains AlCl3 and probably contains MgCl2. 
E) the solution can contain only AlCl3. 
A) the solution definitely contains AlCl3 and cannot contain MgCl2. 
B) the solution contains only NaCl. 
C) the solution contains at least two of the compounds,but it cannot be determined which two are present. 
D) the solution definitely contains AlCl3 and probably contains MgCl2. 
E) the solution can contain only AlCl3.

Question 11

The Solvay process is an industrial method for the production of what compound?

Accepted Answer

A) Li2CO3 
B) Na2CO3 
C) NaOH 
D) KO2 
E) KNO3 
A) Li2CO3 
B) Na2CO3 
C) NaOH 
D) KO2 
E) KNO3

Question 12

Choose the most metallic element.

Accepted Answer

A) As 
B) P 
C) Bi 
D) N 
E) Sb 
A) As 
B) P 
C) Bi 
D) N 
E) Sb

Question 13

The oxidation state of nitrogen (given in parentheses)is correct in all the following cases except

Accepted Answer

A) HN3 (-1). 
B) N2O3 (+3). 
C) HNO3 (+5). 
D) NH4+ (-3). 
E) N2O (+1). 
A) HN3 (-1). 
B) N2O3 (+3). 
C) HNO3 (+5). 
D) NH4+ (-3). 
E) N2O (+1).

Question 14

Which of the following compounds would not be expected to react with oxygen?

Accepted Answer

A) NH3 
B) N2H4 
C) N2O5 
D) N2O4 
E) Li3N 
A) NH3 
B) N2H4 
C) N2O5 
D) N2O4 
E) Li3N

Question 15

Which element reacts most vigorously with water?

Accepted Answer

A) Al 
B) Li 
C) Ba 
D) Mg 
E) Cs 
A) Al 
B) Li 
C) Ba 
D) Mg 
E) Cs

Question 16

Which one of the following metals reacts least vigorously with water?

Accepted Answer

A) Li 
B) Ca 
C) Na 
D) Mg 
E) K 
A) Li 
B) Ca 
C) Na 
D) Mg 
E) K

Question 17

Which of the following compounds is a peroxide?

Accepted Answer

A) Al2O3 
B) Na2O2 
C) BaO 
D) SiO2 
E) Na2O 
A) Al2O3 
B) Na2O2 
C) BaO 
D) SiO2 
E) Na2O

Question 18

A sample of pure deuterium oxide,D2O,is mixed with a sample of pure water,H2O.After a period of time,the mixture will be

Accepted Answer

A) mostly H2O. 
B) mostly D3O+. 
C) mostly D2O. 
D) an equilibrium mixture of D2O,H2O,and DOH. 
E) mostly OD-. 
A) mostly H2O. 
B) mostly D3O+. 
C) mostly D2O. 
D) an equilibrium mixture of D2O,H2O,and DOH. 
E) mostly OD-.

Question 19

What is the principal source of commercial helium?

Accepted Answer

A) Certain natural gas wells. 
B) Fractional distillation of air. 
C) It is a byproduct of commercial fusion research. 
D) It is a byproduct of commercial fission reactors. 
E) The mineral cleveite,a uranium ore. 
A) Certain natural gas wells. 
B) Fractional distillation of air. 
C) It is a byproduct of commercial fusion research. 
D) It is a byproduct of commercial fission reactors. 
E) The mineral cleveite,a uranium ore.

Question 20

Which of the following is the acid anhydride of orthophosphoric acid?

Accepted Answer

A) P4O10 
B) PO4 
C) P4 (white phosphorus) 
D) P4O6 
E) P (red phosphorus) 
A) P4O10 
B) PO4 
C) P4 (white phosphorus) 
D) P4O6 
E) P (red phosphorus)

Exam 21: Chemistry of the Main-Group Metals

The valence electrons in a metal crystal are

The Goldschmidt process is a method to

Which of the following reactions does not represent a commercial method for preparing hydrogen gas?

Which of the following statements concerning magnesium is false?

Which of the following equations describes the reaction of copper metal with dilute nitric acid?

Which of the following is not an allotropic form of sulfur?

Which of the following reactions is a disproportionation?

Which of the following metals will have the most vigorous reaction with water?

Which of the following statements is true?

A solution may contain NaCl,MgCl2,and/or AlCl3.When sodium hydroxide is added,a white precipitate forms that dissolves as more NaOH is added.Therefore,

The Solvay process is an industrial method for the production of what compound?

Choose the most metallic element.

The oxidation state of nitrogen (given in parentheses)is correct in all the following cases except

Which of the following compounds would not be expected to react with oxygen?

Which element reacts most vigorously with water?

Which one of the following metals reacts least vigorously with water?

Which of the following compounds is a peroxide?

A sample of pure deuterium oxide,D2O,is mixed with a sample of pure water,H2O.After a period of time,the mixture will be

What is the principal source of commercial helium?

Which of the following is the acid anhydride of orthophosphoric acid?

Chemistry and Measurement

Atoms, molecules, and Ions

Calculations With Chemical Formulas and Equations

Chemical Reactions

The Gaseous State

Thermochemistry

Quantum Theory of the Atom

Electron Configurations and Periodicity

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

States of Matter; Liquids and Solids

Solutions

Rates of Reaction

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Thermodynamics and Equilibrium

Electrochemistry

Nuclear Chemistry

The Transition Elements and Coordination Compounds

Organic Chemistry

Polymer Materials: Synthetic and Biological

Filters

A solution may contain NaCl,MgCl₂,and/or AlCl₃.When sodium hydroxide is added,a white precipitate forms that dissolves as more NaOH is added.Therefore,

A sample of pure deuterium oxide,D₂O,is mixed with a sample of pure water,H₂O.After a period of time,the mixture will be