Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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) explosives 
A) solid phase chemical properties 
B) electrical processes 
C) thermal processes 
D) aqueous chemical processes 
E) explosives

Question 3

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. 
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.

Question 4

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...

Question 5

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) Mercuration 
A) Mercury complex 
B) Mercury poison 
C) Amalgam 
D) Mineralization 
E) Mercuration

Question 6

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. 
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.

Question 7

What metallurgical process is used to obtain aluminum metal?

Accepted Answer

Electrolytic reducti

Question 8

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

Question 9

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. 
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.

Question 10

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

Accepted Answer

A) Cu 
B) Au 
C) Mg 
D) Cl 
E) Ca 
A) Cu 
B) Au 
C) Mg 
D) Cl 
E) Ca

Question 11

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 drawing 
A) Gangue 
B) Mining 
C) Fetching 
D) Flotation 
E) Mineral drawing

Question 12

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

Question 13

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) Sb 
A) C 
B) P 
C) As 
D) Ga 
E) Sb

Question 14

The Downs cell is used in the production of

Accepted Answer

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

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

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

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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)    
A)    
B)    
C)    
D)    
E)

Question 19

Elements in a group exhibit different properties.

Accepted Answer

A) True 
 B)False

Question 20

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. 
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.

Exam 23: Metallurgy and the Chemistry of Metals

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

Pyrometallurgy uses __________________ to separate a metal from its ore.

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

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

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

Which statement is not correct?

What metallurgical process is used to obtain aluminum metal?

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

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

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

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

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

The Downs cell is used in the production of

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

Which is the principal reducing agent in a blast furnace?

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

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

Elements in a group exhibit different properties.

Alloying a metal is done to

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