Question 1

Which is the principal reducing agent in a blast furnace?

Accepted Answer

A)  CaO(s) 
B)  CaSiO3(l) 
C)  CO(g) 
D)  O2(g) 
E)  CO2(g) F) C) and E)
G) A) and B)

Question 2

In a compound,the oxidation number of an alkali metal is always +1.

Accepted Answer

A) True 
 B)False

Question 3

What is the name of the process used to separate the minerals from the waste in ore?

Accepted Answer

A)  Gangue
B)  Mining
C)  Fetching
D)  Flotation
E)  Mineral drawingF) C) and E)
G) C) and D)

Question 4

Alloys of iron that contain 1.0-1.5% carbon and some manganese,phosphorus,silicon,and sulfur are called

Accepted Answer

A)  steel.
B)  cast iron.
C)  coke.
D)  pig iron.
E)  hematite.F) A) and C)
G) B) and D)

Question 5

Alloying a metal is done to

Accepted Answer

A)  make its extraction from its ore easier.
B)  convert the metal to an oxide.
C)  disguise the true identity of the metal.
D)  prepare ultrapure metal samples.
E)  enhance properties,like conductivity.F) C) and E)
G) B) and E)

Question 6

According to the band theory,which of these statements provide(s) an explanation for the high electrical conductivity of metals? I.a completely filled conduction band
II) a valence band overlapping an empty conduction band
III) a filled valence band
IV) a large gap between the valence band and the conduction band

Accepted Answer

A)  II
B)  I and III
C)  III
D)  III and IV
E)  IVF) B) and C)
G) B) and E)

Question 7

Which is the best representation for a solution composed of sodium dissolved in liquid ammonia? (Ammonia molecules have been omitted for clarity.)

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) B) and C)
G) B) and E)

Question 8

Beryllium,the first element in Group 2A,is the most metallic element in the group.

Accepted Answer

A) True 
 B)False

Question 9

Mercury,magnesium,and zinc have low enough boiling points that they can be purified by distillation.

Accepted Answer

A) True 
 B)False

Question 10

Which one of these elements would give a p-type semiconductor when added to a silicon crystal?

Accepted Answer

A)  C
B)  P
C)  As
D)  Ga
E)  SbF) A) and E)
G) B) and C)

Question 11

Which reaction is a good small-scale laboratory method for the preparation of hydrogen?

Accepted Answer

A)  CH4(g) + H2O(g) → CO(g) + 3H2(g) 
B)  3FeCl2 (s) + 4H2O(g) → Fe3O4(s) + 6HCl(g) + H2(g) 
C)  NaH(s) + H2O(l) → NaOH(aq) + H2(g) 
D)  CO(g) + H2O(g) → CO2(g) + H2(g) 
E)  None of these methods is useful.F) A) and C)
G) B) and D)

Question 12

Calcium oxide is added to molten iron in the production of carbon steel in order to

Accepted Answer

A)  convert silicon and phosphorus oxides to slag which can be decanted from the molten steel.
B)  serve as a scrubber to remove sulfur dioxide from the gases leaving the furnace.
C)  remove any traces of acid which could weaken the steel.
D)  add a small amount of oxygen to the steel to prevent corrosion and increase its strength.
E)  create gangue.F) D) and E)
G) A) and E)

Question 13

What metallurgical process is used to obtain aluminum metal?

Accepted Answer

Electrolytic reducti...

Question 14

Which statement is not correct?

Accepted Answer

A)  Aluminum has a low density versus other metals.
B)  Al(OH) 3 is an amphoteric compound.
C)  Metallic aluminum is toxic to humans.
D)  Aluminum is very reactive with oxygen.
E)  Metallic aluminum conducts electricity.F) C) and D)
G) A) and D)

Question 15

When mercury combines with other metals,what is the name given to the species formed?

Accepted Answer

A)  Mercury complex
B)  Mercury poison
C)  Amalgam
D)  Mineralization
E)  MercurationF) C) and E)
G) None of the above

Question 16

Seawater is a good source of which of the following metals?

Accepted Answer

A)  Cu
B)  Au
C)  Mg
D)  Cl
E)  CaF) C) and E)
G) None of the above

Question 17

The Downs cell is used in the production of

Accepted Answer

A)  copper.
B)  hydrogen.
C)  iron.
D)  magnesium.
E)  sodium.F) D) and E)
G) A) and E)

Question 18

Elements in a group exhibit different properties.

Accepted Answer

A) True 
 B)False

Question 19

Pyrometallurgy uses __________________ to separate a metal from its ore.

Accepted Answer

A)  solid phase chemical properties
B)  electrical processes
C)  thermal processes
D)  aqueous chemical processes
E)  explosivesF) A) and B)
G) A) and C)

Question 20

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

Accepted Answer

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

Exam 23: Metallurgy and the Chemistry of Metals

Elements in a group exhibit different properties.

Correct Answer
verified

Seawater is a good source of which of the following metals?

Correct Answer
verified

Which reaction is a good small-scale laboratory method for the preparation of hydrogen?

Correct Answer
verified

Which is the best representation for a solution composed of sodium dissolved in liquid ammonia? (Ammonia molecules have been omitted for clarity.)

Correct Answer
verified

Which one of these elements would give a p-type semiconductor when added to a silicon crystal?

Correct Answer
verified

What metallurgical process is used to obtain aluminum metal?

Correct Answer
verified
Electrolytic reducti...
View Answer

Which statement is not correct?

Correct Answer
verified

In a compound,the oxidation number of an alkali metal is always +1.

Correct Answer
verified

Alloys of iron that contain 1.0-1.5% carbon and some manganese,phosphorus,silicon,and sulfur are called

Correct Answer
verified

What is the name of the process used to separate the minerals from the waste in ore?

Correct Answer
verified

Correct Answer
verified

Beryllium,the first element in Group 2A,is the most metallic element in the group.

Correct Answer
verified

Calcium oxide is added to molten iron in the production of carbon steel in order to

Correct Answer
verified

Mercury,magnesium,and zinc have low enough boiling points that they can be purified by distillation.

Correct Answer
verified

The Downs cell is used in the production of

Correct Answer
verified

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

Correct Answer
verified

Which is the principal reducing agent in a blast furnace?

Correct Answer
verified

Pyrometallurgy uses __________________ to separate a metal from its ore.

Correct Answer
verified

Alloying a metal is done to

Correct Answer
verified

When mercury combines with other metals,what is the name given to the species formed?

Correct Answer
verified

Exam 23: Metallurgy and the Chemistry of Metals

Elements in a group exhibit different properties.

Correct AnswerverifiedShow Answer

Seawater is a good source of which of the following metals?

Correct AnswerverifiedShow Answer

Which reaction is a good small-scale laboratory method for the preparation of hydrogen?

Correct AnswerverifiedShow Answer

Which is the best representation for a solution composed of sodium dissolved in liquid ammonia? (Ammonia molecules have been omitted for clarity.)

Correct AnswerverifiedShow Answer

Which one of these elements would give a p-type semiconductor when added to a silicon crystal?

Correct AnswerverifiedShow Answer

What metallurgical process is used to obtain aluminum metal?

Correct AnswerverifiedElectrolytic reducti...View AnswerShow Answer

Which statement is not correct?

Correct AnswerverifiedShow Answer

In a compound,the oxidation number of an alkali metal is always +1.

Correct AnswerverifiedShow Answer

Alloys of iron that contain 1.0-1.5% carbon and some manganese,phosphorus,silicon,and sulfur are called

Correct AnswerverifiedShow Answer

What is the name of the process used to separate the minerals from the waste in ore?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Beryllium,the first element in Group 2A,is the most metallic element in the group.

Correct AnswerverifiedShow Answer

Calcium oxide is added to molten iron in the production of carbon steel in order to

Correct AnswerverifiedShow Answer

Mercury,magnesium,and zinc have low enough boiling points that they can be purified by distillation.

Correct AnswerverifiedShow Answer

The Downs cell is used in the production of

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which is the principal reducing agent in a blast furnace?

Correct AnswerverifiedShow Answer

Pyrometallurgy uses __________________ to separate a metal from its ore.

Correct AnswerverifiedShow Answer

Alloying a metal is done to

Correct AnswerverifiedShow Answer

When mercury combines with other metals,what is the name given to the species formed?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Electrolytic reducti...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified