Question 1

Which of the following statements about lithium is false?

Accepted Answer

A) Lithium reacts with oxygen to produce lithium peroxide. 
B) The commercial source of lithium is the ore spodumene. 
C) Lithium metal is obtained by electrolysis of lithium chloride. 
D) Lithium reacts with water to produce lithium hydroxide and hydrogen gas. 
E) Lithium is commonly used as the anode in batteries. 
A) Lithium reacts with oxygen to produce lithium peroxide. 
B) The commercial source of lithium is the ore spodumene. 
C) Lithium metal is obtained by electrolysis of lithium chloride. 
D) Lithium reacts with water to produce lithium hydroxide and hydrogen gas. 
E) Lithium is commonly used as the anode in batteries.

Question 2

Which of the following combinations of common name and formula is incorrect?

Accepted Answer

A) plaster of Paris,CaHCO3 
B) slaked lime,Ca(OH)2 
C) quicklime,CaO 
D) limestone,CaCO3 
E) slag,CaSiO3 
A) plaster of Paris,CaHCO3 
B) slaked lime,Ca(OH)2 
C) quicklime,CaO 
D) limestone,CaCO3 
E) slag,CaSiO3

Question 3

The major industrial source of hydrogen gas is the reaction of methane and water at high temperatures (800-1000°C)and high pressures (10-15 atm)with nickel as a catalyst.   If 150.0 g of CH4 and 150.0 g of H2O are reacted at 915°C and 11.0 atm,how much hydrogen should be available for industrial use?

Accepted Answer

A) 171 L 
B) 1330 L 
C) 249 L 
D) 25.0 L 
E) 222 L 
A) 171 L 
B) 1330 L 
C) 249 L 
D) 25.0 L 
E) 222 L

Question 4

The Group 8A elements in the periodic table are called _____.

Accepted Answer

A) noble gases​ 
B) metalloids​ 
C) lanthanides​ 
D) alkali metals​ 
E) ​ideal gases 
A) noble gases​ 
B) metalloids​ 
C) lanthanides​ 
D) alkali metals​ 
E) ​ideal gases

Question 5

Which of the following statements about compounds of lithium is false?

Accepted Answer

A) Lithium hydroxide is a strong base. 
B) Lithium carbonate is much more soluble in water than is sodium carbonate. 
C) Lithium carbonate is a medication used to treat bipolar disorder. 
D) Lithium hydroxide is used to remove carbon dioxide from the air in spacecraft. 
E) Lithium hydroxide is produced by the reaction of calcium hydroxide with lithium carbonate. 
A) Lithium hydroxide is a strong base. 
B) Lithium carbonate is much more soluble in water than is sodium carbonate. 
C) Lithium carbonate is a medication used to treat bipolar disorder. 
D) Lithium hydroxide is used to remove carbon dioxide from the air in spacecraft. 
E) Lithium hydroxide is produced by the reaction of calcium hydroxide with lithium carbonate.

Question 6

Which of the following is not a form of silicon dioxide?

Accepted Answer

A) sand 
B) quartz 
C) amethyst 
D) glass 
E) silicone 
A) sand 
B) quartz 
C) amethyst 
D) glass 
E) silicone

Question 7

Polyphosphoric and metaphosphoric acids are made by a series of _____ reactions of orthophosphoric acid.

Accepted Answer

A) condensation 
B) oxidation 
C) reduction 
D) combustion 
E) precipitation 
A) condensation 
B) oxidation 
C) reduction 
D) combustion 
E) precipitation

Question 8

Dinitrogen gas is prepared commercially

Accepted Answer

A) from the decomposition of ammonia. 
B) from the decomposition of magnesium nitride. 
C) from the electrolytic reduction of ammonium salts. 
D) from the distillation of air. 
E) from the electrolytic reduction of nitrate salts. 
A) from the decomposition of ammonia. 
B) from the decomposition of magnesium nitride. 
C) from the electrolytic reduction of ammonium salts. 
D) from the distillation of air. 
E) from the electrolytic reduction of nitrate salts.

Question 9

Which of the following properties of the alkali metals does not increase with increasing atomic number?

Accepted Answer

A) ionic radius 
B) reactivity with water 
C) atomic radius 
D) atomic weight 
E) ionization energy 
A) ionic radius 
B) reactivity with water 
C) atomic radius 
D) atomic weight 
E) ionization energy

Question 10

Which molecule does not have a bent molecular geometry?

Accepted Answer

A) H2O 
B) SO2 
C) N2O 
D) O3 
E) H2S 
A) H2O 
B) SO2 
C) N2O 
D) O3 
E) H2S

Question 11

What makes metals a good conductor of heat and electricity?

Accepted Answer

A) ​Overlapping of the molecular orbitals 
B) ​Mobility of positively charged positrons 
C) ​Mobility of valence electrons 
D) ​High mass of the atomic nucleus 
E) ​Low mass of the atomic nucleus 
A) ​Overlapping of the molecular orbitals 
B) ​Mobility of positively charged positrons 
C) ​Mobility of valence electrons 
D) ​High mass of the atomic nucleus 
E) ​Low mass of the atomic nucleus

Question 12

Which of the noble gases is not obtained commercially by distillation of liquid air?

Accepted Answer

A) krypton 
B) neon 
C) helium 
D) argon 
E) xenon 
A) krypton 
B) neon 
C) helium 
D) argon 
E) xenon

Question 13

Which of the following is not a possible formula for a silicate anion?

Accepted Answer

A) SiO3- 
B) Si4O1310- 
C) Si2O76- 
D) Si6O1812- 
E) SiO44- 
A) SiO3- 
B) Si4O1310- 
C) Si2O76- 
D) Si6O1812- 
E) SiO44-

Question 14

Highly pure silicon for the manufacture of solid state electronic devices is made on an industrial scale by

Accepted Answer

A) reduction of SiCl4(g)with hydrogen gas. 
B) reduction of SiO2(s)with coke (amorphous carbon). 
C) thermal decomposition of SiH4(g). 
D) reduction of SiCl4(g)with an alkali metal. 
E) reduction of SiO2(s)with aluminum. 
A) reduction of SiCl4(g)with hydrogen gas. 
B) reduction of SiO2(s)with coke (amorphous carbon). 
C) thermal decomposition of SiH4(g). 
D) reduction of SiCl4(g)with an alkali metal. 
E) reduction of SiO2(s)with aluminum.

Question 15

Which of the following compounds is not an allotrope of carbon?

Accepted Answer

A) diamond 
B) All are allotropes of carbon. 
C) methane 
D) graphite 
E) buckminsterfullerene 
A) diamond 
B) All are allotropes of carbon. 
C) methane 
D) graphite 
E) buckminsterfullerene

Question 16

Which of the noble gases was detected in the spectrum of the sun before it was ever isolated on earth?

Accepted Answer

A) neon 
B) krypton 
C) xenon 
D) argon 
E) helium 
A) neon 
B) krypton 
C) xenon 
D) argon 
E) helium

Question 17

In the first stage of the Bayer process bauxite is mixed with a strong base.What is the purpose of the strong base?

Accepted Answer

A) Strong base dissolves the silicate constituents of the ore,leaving pure aluminum oxide as a precipitate to be collected by filtration. 
B) Strong base favors the formation of a soluble anion of the aluminum,leaving the silicates and other impurities as precipitates to be removed by filtration. 
C) Strong base dissolves the silicate constituents of the ore and precipitates the aluminum as Al(OH)3 for collection by filtration. 
D) Strong base dissolves the silicates and aluminum constituents of the ore,allowing for the removal of any insoluble impurities by filtration and eventual precipitation of the aluminum from the filtrate. 
E) The strong base,along with HF,is used to extract the aluminum from the ore as cryolite,a compound used in the electrolytic reduction of aluminum. 
A) Strong base dissolves the silicate constituents of the ore,leaving pure aluminum oxide as a precipitate to be collected by filtration. 
B) Strong base favors the formation of a soluble anion of the aluminum,leaving the silicates and other impurities as precipitates to be removed by filtration. 
C) Strong base dissolves the silicate constituents of the ore and precipitates the aluminum as Al(OH)3 for collection by filtration. 
D) Strong base dissolves the silicates and aluminum constituents of the ore,allowing for the removal of any insoluble impurities by filtration and eventual precipitation of the aluminum from the filtrate. 
E) The strong base,along with HF,is used to extract the aluminum from the ore as cryolite,a compound used in the electrolytic reduction of aluminum.

Question 18

What is the gas obtained by gently heating NH4NO3?

Accepted Answer

A) N2 
B) NO2 
C) N2O 
D) NO3 
E) N2O3 
A) N2 
B) NO2 
C) N2O 
D) NO3 
E) N2O3

Question 19

Which element commonly has both +1 and +3 oxidation states?

Accepted Answer

A) Tl 
B) Pb 
C) Ba 
D) Al 
E) Cu 
A) Tl 
B) Pb 
C) Ba 
D) Al 
E) Cu

Question 20

Which of the following ions are oxidized by chlorine gas in an aqueous solution?

Accepted Answer

A) F− only 
B) Br− only 
C) I− only 
D) Br− and I− 
E) I−,Br−,and F− 
A) F− only 
B) Br− only 
C) I− only 
D) Br− and I− 
E) I−,Br−,and F−

Exam 21: Chemistry of the Main-Group Metals

Which of the following statements about lithium is false?

Which of the following combinations of common name and formula is incorrect?

The Group 8A elements in the periodic table are called _____.

Which of the following statements about compounds of lithium is false?

Which of the following is not a form of silicon dioxide?

Polyphosphoric and metaphosphoric acids are made by a series of _____ reactions of orthophosphoric acid.

Dinitrogen gas is prepared commercially

Which of the following properties of the alkali metals does not increase with increasing atomic number?

Which molecule does not have a bent molecular geometry?

What makes metals a good conductor of heat and electricity?

Which of the noble gases is not obtained commercially by distillation of liquid air?

Which of the following is not a possible formula for a silicate anion?

Highly pure silicon for the manufacture of solid state electronic devices is made on an industrial scale by

Which of the following compounds is not an allotrope of carbon?

Which of the noble gases was detected in the spectrum of the sun before it was ever isolated on earth?

In the first stage of the Bayer process bauxite is mixed with a strong base.What is the purpose of the strong base?

What is the gas obtained by gently heating NH4NO3?

Which element commonly has both +1 and +3 oxidation states?

Which of the following ions are oxidized by chlorine gas in an aqueous solution?

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

What is the gas obtained by gently heating NH₄NO₃?