Question 1

The Hall process refers to

Accepted Answer

A)  the production of aluminum by electrolysis.
B)  the recovery of sulfur from underground deposits.
C)  the manufacture of sulfuric acid.
D)  the production of ammonia from nitrogen and hydrogen gases.
E)  the isolation of Al2O3 from bauxite.F) A) and E)
G) A) and D)

Question 2

The process that selectively extracts a metal from its ore,by dissolving it,is called

Accepted Answer

A)  roasting.
B)  leaching.
C)  smelting.
D)  flotation.
E)  hydration.F) None of the above
G) C) and E)

Question 3

A metal crystal consisting of 1 × 1020 atoms has 0.5 × 1020 bonding orbitals and 0.5 × 1020 antibonding molecular orbitals.

Accepted Answer

A) True 
 B)False

Question 4

What is the name for the elements in Group 2A of the periodic table?

Accepted Answer

Alkaline e...

Question 5

Which of these elements when doped into silicon would give an n-type semiconductor?

Accepted Answer

A)  C
B)  Ga
C)  P
D)  Ge
E)  BF) A) and C)
G) C) and D)

Question 6

The _________ process is a fractional distillation process for the purification of nickel.

Accepted Answer

The answer of The _________ process is a fractional distillation...

Question 7

Which diagram best corresponds to the energy level diagram of a semiconductor?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and B)
G) All of the above

Question 8

Bauxite (Al2O3 • 2H2O)ore is the commercial source of aluminum metal.

Accepted Answer

A) True 
 B)False

Question 9

What effect does increasing temperature have on the conductivities of semiconductors?

Accepted Answer

A)  Increases
B)  Decreases
C)  No change
D)  Cannot be predictedE) None of the above
F) All of the above A

Question 10

The Hall process involves the reduction of Al2O3 to aluminum by

Accepted Answer

A)  carbon (coke) .
B)  carbon monoxide.
C)  molecular hydrogen.
D)  sodium.
E)  electrolysis.F) A) and B)
G) B) and E)

Question 11

What is the major component in limestone?

Accepted Answer

A)  NaNO3
B)  KCl
C)  CaCl
D)  BaSO4
E)  CaCO3F) A) and C)
G) B) and E)

Question 12

Magnesium reacts with dilute hydrochloric acid according to which of these equations?

Accepted Answer

A)  Mg + 2HCl → 2H+ + MgCl
B)  Mg + 2HCl → H2 + MgCl2
C)  Mg + 2HCl → Cl2 + MgH2
D)  Mg + 2HCl → Cl2 + Mg2+ + 2H+E) All of the above
F) None of the above

Question 13

Aluminum and magnesium are light metals which are used in many structural applications.

Accepted Answer

Although they are highly active metals (as their electrode potentials suggest),they can often be used without the use of paint or other applied finishes to protect them against corrosion.How is this possible? Both Al and Mg have strong,adherent,relatively insoluble oxides.These form naturally on the metal surface,in the presence of atmospheric oxygen,and serve to protect the underlying metal from further oxidation/corrosion.

Question 14

What is the chemical formula for talc?

Accepted Answer

A)  NaNO3
B)  Mg3(PO4) 2
C)  CaCO3
D)  Mg3(Si4O10) (OH) 2
E)  Ca3(PO4) 2F) D) and E)
G) B) and C) D

Question 15

What is the science and technology of separating metals from their ores and of compounding alloys?

Accepted Answer

The answer of What is the science and technology of...

Question 16

Aluminum chloride reacts with manganese metal to form aluminum metal and manganese(II)
chloride.Which substance is oxidized in this reaction?

Accepted Answer

The answer of Aluminum chloride reacts with manganese metal to...

Question 17

What gas is produced at the anode in the Hall process for the electrolytic production of aluminum?

Accepted Answer

The answer of What gas is produced at the anode...

Question 18

What is another name for iron carbide (Fe3C)?

Accepted Answer

Question 19

What is the chemical formula for gypsum?

Accepted Answer

A)  CaSO4• 2H2O
B)  CaF2
C)  MgSO4• 5H2O
D)  MgSO4• 7H2O
E)  CaCl2F) B) and E)
G) A) and E)

Question 20

A(n)_______________ is an alloy of mercury with another metal.

Accepted Answer

The answer of A(n)_______________ is an alloy of mercury with...

Exam 23: Metallurgy and the Chemistry of Metals

The Hall process refers to

Correct Answer
verified

The process that selectively extracts a metal from its ore,by dissolving it,is called

Correct Answer
verified

A metal crystal consisting of 1 × 10²⁰ atoms has 0.5 × 10²⁰ bonding orbitals and 0.5 × 10²⁰ antibonding molecular orbitals.

Correct Answer
verified

What is the name for the elements in Group 2A of the periodic table?

Correct Answer
verified
Alkaline e...
View Answer

Which of these elements when doped into silicon would give an n-type semiconductor?

Correct Answer
verified

The _________ process is a fractional distillation process for the purification of nickel.

Correct Answer
verified

Which diagram best corresponds to the energy level diagram of a semiconductor?

Correct Answer
verified

Bauxite (Al₂O₃ • 2H₂O)ore is the commercial source of aluminum metal.

Correct Answer
verified

What effect does increasing temperature have on the conductivities of semiconductors?

Correct Answer
verified
A

The Hall process involves the reduction of Al₂O₃ to aluminum by

Correct Answer
verified

What is the major component in limestone?

Correct Answer
verified

Magnesium reacts with dilute hydrochloric acid according to which of these equations?

Correct Answer
verified

Aluminum and magnesium are light metals which are used in many structural applications.

What is the chemical formula for talc?

Correct Answer
verified
D

What is the science and technology of separating metals from their ores and of compounding alloys?

Correct Answer
verified

Aluminum chloride reacts with manganese metal to form aluminum metal and manganese(II) chloride.Which substance is oxidized in this reaction?

Correct Answer
verified

What gas is produced at the anode in the Hall process for the electrolytic production of aluminum?

Correct Answer
verified

What is another name for iron carbide (Fe₃C)?

Correct Answer
verified

What is the chemical formula for gypsum?

Correct Answer
verified

A(n)_______________ is an alloy of mercury with another metal.

Correct Answer
verified

Exam 23: Metallurgy and the Chemistry of Metals

The Hall process refers to

Correct AnswerverifiedShow Answer

The process that selectively extracts a metal from its ore,by dissolving it,is called

Correct AnswerverifiedShow Answer

A metal crystal consisting of 1 × 1020 atoms has 0.5 × 1020 bonding orbitals and 0.5 × 1020 antibonding molecular orbitals.

Correct AnswerverifiedShow Answer

What is the name for the elements in Group 2A of the periodic table?

Correct AnswerverifiedAlkaline e...View AnswerShow Answer

Which of these elements when doped into silicon would give an n-type semiconductor?

Correct AnswerverifiedShow Answer

The _________ process is a fractional distillation process for the purification of nickel.

Correct AnswerverifiedShow Answer

Which diagram best corresponds to the energy level diagram of a semiconductor?

Correct AnswerverifiedShow Answer

Bauxite (Al2O3 • 2H2O)ore is the commercial source of aluminum metal.

Correct AnswerverifiedShow Answer

What effect does increasing temperature have on the conductivities of semiconductors?

Correct AnswerverifiedA

The Hall process involves the reduction of Al2O3 to aluminum by

Correct AnswerverifiedShow Answer

What is the major component in limestone?

Correct AnswerverifiedShow Answer

Magnesium reacts with dilute hydrochloric acid according to which of these equations?

Correct AnswerverifiedShow Answer

Aluminum and magnesium are light metals which are used in many structural applications.

What is the chemical formula for talc?

Correct AnswerverifiedD

What is the science and technology of separating metals from their ores and of compounding alloys?

Correct AnswerverifiedShow Answer

Aluminum chloride reacts with manganese metal to form aluminum metal and manganese(II) chloride.Which substance is oxidized in this reaction?

Correct AnswerverifiedShow Answer

What gas is produced at the anode in the Hall process for the electrolytic production of aluminum?

Correct AnswerverifiedShow Answer

What is another name for iron carbide (Fe3C)?

Correct AnswerverifiedShow Answer

What is the chemical formula for gypsum?

Correct AnswerverifiedShow Answer

A(n)_______________ is an alloy of mercury with another metal.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

A metal crystal consisting of 1 × 10²⁰ atoms has 0.5 × 10²⁰ bonding orbitals and 0.5 × 10²⁰ antibonding molecular orbitals.

Correct Answer
verified

Correct Answer
verified
Alkaline e...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Bauxite (Al₂O₃ • 2H₂O)ore is the commercial source of aluminum metal.

Correct Answer
verified

Correct Answer
verified
A

The Hall process involves the reduction of Al₂O₃ to aluminum by

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is another name for iron carbide (Fe₃C)?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified