Question 1

Which of these reactions represents the removal of silica from iron ore in a blast furnace?

Accepted Answer

A) SiO2(s)→ SiO2(g) 
B) SiO2(s)+ CaO(s)→ CaSiO3(l) 
C) SiO2(s)+ 4HF(g)→ SiF4(g)+ 2H2O(g) 
D) SiO2(s)+ C(s)→ Si(l)+ CO2(g) 
E) SiO2(s)+ CO(g)→ SiCO3(l) 
A) SiO2(s)→ SiO2(g) 
B) SiO2(s)+ CaO(s)→ CaSiO3(l) 
C) SiO2(s)+ 4HF(g)→ SiF4(g)+ 2H2O(g) 
D) SiO2(s)+ C(s)→ Si(l)+ CO2(g) 
E) SiO2(s)+ CO(g)→ SiCO3(l)

Question 2

Potassium is produced industrially by the reaction
Na(g)+ KCl(l)   NaCl(l)+ K(g)

Accepted Answer

The reaction is carried out at 850°C,but

Question 3

Cryolite,Na3AlF6,is used in the electrolysis of aluminum oxide because

Accepted Answer

A) it is a good source of fluoride ions. 
B) it reduces the energy requirement of the process,due to its low melting point. 
C) it provides a source of fluorine,an oxidizing agent. 
D) it provides a source of sodium,a reducing agent. 
E) it is very soluble in water. 
A) it is a good source of fluoride ions. 
B) it reduces the energy requirement of the process,due to its low melting point. 
C) it provides a source of fluorine,an oxidizing agent. 
D) it provides a source of sodium,a reducing agent. 
E) it is very soluble in water.

Question 4

A(n)__________ is a solid solution either of two or more metals,or of a metal or metals with one or more nonmetals.

Accepted Answer

The answer of A(n)__________ is a solid solution either of...

Question 5

Which is NOT a chemical reaction that occurs in a blast furnace in the production of iron?

Accepted Answer

A) CaCO3(s)→ CaO(s)+ CO2(g) 
B) 3Fe2O3(s)+ CO(g)→ 2Fe3O4(s)+ CO2(g) 
C) 2FeO(s)+ CO(g)→ Fe2O3(s)+ C(s) 
D) Fe3O4(s)+ CO(g)→ 3FeO(s)+ CO2(g) 
E) FeO(s)+ CO(g)→ Fe(l)+ CO2(g) 
A) CaCO3(s)→ CaO(s)+ CO2(g) 
B) 3Fe2O3(s)+ CO(g)→ 2Fe3O4(s)+ CO2(g) 
C) 2FeO(s)+ CO(g)→ Fe2O3(s)+ C(s) 
D) Fe3O4(s)+ CO(g)→ 3FeO(s)+ CO2(g) 
E) FeO(s)+ CO(g)→ Fe(l)+ CO2(g)

Question 6

Nickel is often purified using

Accepted Answer

A) amalgamation. 
B) the Hall process. 
C) the Mond process. 
D) pressurization. 
E) a blast furnace. 
A) amalgamation. 
B) the Hall process. 
C) the Mond process. 
D) pressurization. 
E) a blast furnace.

Question 7

Which metal's commercial source is seawater?

Accepted Answer

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

Question 8

What is the source of most metals?

Accepted Answer

A) Industry 
B) Synthesis 
C) Saturated 
D) Ocean floor 
E) Minerals 
A) Industry 
B) Synthesis 
C) Saturated 
D) Ocean floor 
E) Minerals

Question 9

What is another name for potassium nitrate?

Accepted Answer

The answer of What is another name for potassium nitrate?...

Question 10

Which ion is not found in sea water in a concentration high enough to be an industrial source of the metal?

Accepted Answer

A) Ca2+ 
B) Mg2+ 
C) Na+ 
D) K+ 
E) Ag+ 
A) Ca2+ 
B) Mg2+ 
C) Na+ 
D) K+ 
E) Ag+

Question 11

The debris accompanying a mineral is called

Accepted Answer

A) slag. 
B) gangue. 
C) ore. 
D) halite. 
E) ash. 
A) slag. 
B) gangue. 
C) ore. 
D) halite. 
E) ash.

Question 12

The naturally occurring form of a metal that is concentrated enough to allow economical recovery of the metal is know as

Accepted Answer

A) an element. 
B) a mineral. 
C) gangue. 
D) an ore. 
E) an amalgam. 
A) an element. 
B) a mineral. 
C) gangue. 
D) an ore. 
E) an amalgam.

Question 13

The most common source for the commercial production of aluminum is called

Accepted Answer

A) aluminite. 
B) hematite. 
C) galena. 
D) cinnabar. 
E) bauxite. 
A) aluminite. 
B) hematite. 
C) galena. 
D) cinnabar. 
E) bauxite.

Question 14

According to the band theory,a band is

Accepted Answer

A) an elastic force that holds electrons close to atoms in an insulator. 
B) the energy gap associated with semiconductors. 
C) a large number of molecular orbitals that are close together in energy. 
D) a large number of atoms in a crystal. 
A) an elastic force that holds electrons close to atoms in an insulator. 
B) the energy gap associated with semiconductors. 
C) a large number of molecular orbitals that are close together in energy. 
D) a large number of atoms in a crystal.

Question 15

Group 1A elements are called alkaline earth metals.

Accepted Answer

A) True 
 B)False

Question 16

What is the name of the metallurgical process performed at high temperatures?

Accepted Answer

The answer of What is the name of the metallurgical...

Question 17

The final step of the purification of copper involves electrorefining in which copper is separated from nickel and iron by being reduced at the cathode of a cell.Why are nickel and iron not reduced?

Accepted Answer

A) Their reduction potentials are more positive than copper's. 
B) Their reduction potentials are more negative than copper's. 
C) They cannot be deposited on a copper electrode. 
D) Their reduction potentials are more negative than water's. 
E) Their reduction requires large overvoltages. 
A) Their reduction potentials are more positive than copper's. 
B) Their reduction potentials are more negative than copper's. 
C) They cannot be deposited on a copper electrode. 
D) Their reduction potentials are more negative than water's. 
E) Their reduction requires large overvoltages.

Question 18

In the production of aluminum,bauxite is heated with sodium hydroxide solution to _____.

Accepted Answer

A) remove titanium(IV)oxide 
B) remove silica 
C) remove iron oxides 
D) remove potassium 
E) remove fluorides 
A) remove titanium(IV)oxide 
B) remove silica 
C) remove iron oxides 
D) remove potassium 
E) remove fluorides

Question 19

Cast iron as it is prepared in a blast furnace is a product of high purity.

Accepted Answer

A) True 
 B)False

Question 20

Which two compounds are produced by the Solvay process?

Accepted Answer

A) CaCO3 and CaO 
B) CaCO3 and Na2CO3 
C) NaHCO3 and NaCl 
D) NH3 and NH4Cl 
E) NaHCO3 and Na2CO3 
A) CaCO3 and CaO 
B) CaCO3 and Na2CO3 
C) NaHCO3 and NaCl 
D) NH3 and NH4Cl 
E) NaHCO3 and Na2CO3

Exam 23: Metallurgy and the Chemistry of Metals

Which of these reactions represents the removal of silica from iron ore in a blast furnace?

Potassium is produced industrially by the reaction Na(g)+ KCl(l) NaCl(l)+ K(g)

Cryolite,Na3AlF6,is used in the electrolysis of aluminum oxide because

A(n)__________ is a solid solution either of two or more metals,or of a metal or metals with one or more nonmetals.

Which is NOT a chemical reaction that occurs in a blast furnace in the production of iron?

Nickel is often purified using

Which metal's commercial source is seawater?

What is the source of most metals?

What is another name for potassium nitrate?

Which ion is not found in sea water in a concentration high enough to be an industrial source of the metal?

The debris accompanying a mineral is called

The naturally occurring form of a metal that is concentrated enough to allow economical recovery of the metal is know as

The most common source for the commercial production of aluminum is called

According to the band theory,a band is

Group 1A elements are called alkaline earth metals.

What is the name of the metallurgical process performed at high temperatures?

The final step of the purification of copper involves electrorefining in which copper is separated from nickel and iron by being reduced at the cathode of a cell.Why are nickel and iron not reduced?

In the production of aluminum,bauxite is heated with sodium hydroxide solution to _____.

Cast iron as it is prepared in a blast furnace is a product of high purity.

Which two compounds are produced by the Solvay process?

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Reactions in Aqueous Solutions

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Intermolecular Forces and the Physical Properties of Liquids and Solids

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Cryolite,Na₃AlF₆,is used in the electrolysis of aluminum oxide because