Question 1

Which statement about steel is false?

Accepted Answer

A)   It can have different percentage of carbon.
B)   It is a polymer.
C)   It is an alloy of iron.
D)   In can be made so it resists rust.
E)   none of the aboveF) B) and E)
G) A) and B)

Question 2

In a blast furnace, coke is used to provide the needed heat and to provide carbon monoxide to act as a reducing agent.

Accepted Answer

A) True 
 B)False

Question 3

When copper(II)  hydroxide is heated, _ and _ are formed.

Accepted Answer

A)   CuH2 (s)  + O2 (g) 
B)   CuOH (s)  + H2O (g) 
C)   Cu (s) , OH- (g) 
D)   Cu (s) , H2O (l) 
E)   CuO (s) , H2O (l) F) A) and C)
G) A) and D)

Question 4

In the Bayer process, the purpose of lowering the pH after the digested ore has been filtered is
)

Accepted Answer

A)   the dissolve the remaining ore
B)   to precipitate the iron oxide
C)   to precipitate the aluminum hydroxide
D)   to precipitate the iron hydroxide
E)   to dissolve the remaining impuritiesF) A) and E)
G) C) and D)

Question 5

The transition metals in group have the highest melting points.

Accepted Answer

A)   6B
B)   4B
C)   8B
D)   2B
E)   3BF) A) and C)
G) A) and E)

Question 6

What is the name and the formula of the most useful ore of aluminum?

Accepted Answer

The answer of What is the name and the formula...

Question 7

Which one of the following is not true about transition metals?

Accepted Answer

A)   They frequently have more than one common oxidation state.
B)   Their compounds frequently exhibit magnetic properties.
C)   They are found in the d- block of the periodic table.
D)   Their compounds are frequently colored.
E)   They typically have low melting points.F) A) and D)
G) A) and E)

Question 8

Which one of the following copper compounds is black in color?

Accepted Answer

A)   Cu(H2O) 42+
B)   CuO
C)   CuI
D)   CuSO4
E)   CuCl2F) B) and C)
G) A) and B)

Question 9

Which property of metals cannot be explained with the electron- sea model?

Accepted Answer

A)   shine
B)   trends in melting points
C)   high thermal connectivity
D)   high electric connectivity
E)   malleability and ductilityF) All of the above
G) C) and E)

Question 10

18 karat gold contains % gold.

Accepted Answer

A)   25
B)   89
C)   75
D)   100
E)   18F) B) and C)
G) A) and E)

Question 11

The purpose of burning coke in a blast furnace is

Accepted Answer

A)   to produce hydrogen gas.
B)   to produce carbon monoxide gas.
C)   to produce reducing gases.
D)   to produce heat.
E)   all of the aboveF) A) and E)
G) B) and E)

Question 12

For a substitutional alloy to form, the two metals combined must have similar

Accepted Answer

A)   ionization potential and electron affinity.
B)   atomic radii and chemical bonding properties.
C)   reduction potential and size.
D)   number of valance electrons and electronegativity.
E)   band gap and reactivity.F) A) and B)
G) A) and E)

Exam 23: Metals and Metallurgy

Which statement about steel is false?

Correct Answer
verified

The purpose of burning coke in a blast furnace is

Correct Answer
verified

When copper(II) hydroxide is heated, _ and _ are formed.

Correct Answer
verified

In the Bayer process, the purpose of lowering the pH after the digested ore has been filtered is )

Correct Answer
verified

Which one of the following is not true about transition metals?

Correct Answer
verified

In a blast furnace, coke is used to provide the needed heat and to provide carbon monoxide to act as a reducing agent.

Correct Answer
verified

Which one of the following copper compounds is black in color?

Correct Answer
verified

Which property of metals cannot be explained with the electron- sea model?

Correct Answer
verified

What is the name and the formula of the most useful ore of aluminum?

Correct Answer
verified

The transition metals in group have the highest melting points.

Correct Answer
verified

For a substitutional alloy to form, the two metals combined must have similar

Correct Answer
verified

18 karat gold contains % gold.

Correct Answer
verified

Exam 23: Metals and Metallurgy

Which statement about steel is false?

Correct AnswerverifiedShow Answer

The purpose of burning coke in a blast furnace is

Correct AnswerverifiedShow Answer

When copper(II) hydroxide is heated, _ and _ are formed.

Correct AnswerverifiedShow Answer

In the Bayer process, the purpose of lowering the pH after the digested ore has been filtered is )

Correct AnswerverifiedShow Answer

Which one of the following is not true about transition metals?

Correct AnswerverifiedShow Answer

In a blast furnace, coke is used to provide the needed heat and to provide carbon monoxide to act as a reducing agent.

Correct AnswerverifiedShow Answer

Which one of the following copper compounds is black in color?

Correct AnswerverifiedShow Answer

Which property of metals cannot be explained with the electron- sea model?

Correct AnswerverifiedShow Answer

What is the name and the formula of the most useful ore of aluminum?

Correct AnswerverifiedShow Answer

The transition metals in group have the highest melting points.

Correct AnswerverifiedShow Answer

For a substitutional alloy to form, the two metals combined must have similar

Correct AnswerverifiedShow Answer

18 karat gold contains % gold.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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