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NTI Day 3: Extraction of Metals

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 
Which of the following metaks can be extracted by the electrolysis of their molten chlorides?
A.
Mg
C.
Au
B.
Zn
D.
Pb
 

 2. 
WHich of the following metals can be extracted from their oxides by utilizing carbon?
A.
Na
C.
Hg
B.
Sn
D.
Al
 

 3. 
Which of the following metals can be extracted simply by heating its ore?
A.
Hg
C.
Al
B.
Pb
D.
Ca
 

 4. 
Hematite, carbon, oxygen and calcium carbonate are used to extract
A.
Al
C.
Fe
B.
Cu
D.
Pb
 

 5. 
How is steel different from iron?
A.
steel has silicia, phosphorous and sulfur
C.
iron is typically stronger than steel
B.
steel has 0.5 to 1.5 percent carbon
D.
there is no difference between them
 

 6. 
Stainless steel contains
A.
a maximum of 0.25% carbon
C.
no carbon at all
B.
0.45 to 1.50% carbon
D.
little carbon with chromium and nickel added
 

 7. 
What is an alloy?
A.
a mixture of metals
C.
a mixture of a nonmetal and iron
B.
a mixture of a metal and a nonmetal
D.
any metal mixture containing titanium
 



 
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