Multiple Choice
Leaching is
A) melting an ore and separating it from the lower density gangue.
B) selectively dissolving a metal in solution to separate it from its ore.
C) the process of heating an ore to drive off volatile compounds.
D) heating an ore, in the presence of argon or another substance, in order to purify the ore and obtain the liquid metal.
E) heating an ore, in the presence of argon or another substance, in order to cause a chemical reaction that drives off newly formed volatile compounds.
Correct Answer:
Verified
Correct Answer:
Verified
Q30: Write a balanced equation for the calcination
Q31: Which of the following is TRUE concerning
Q32: Which of the following is an example
Q33: Electrometallurgy is<br>A) refining of metal ores using
Q34: Calcination is<br>A) heating an ore, in the
Q36: Give the components of brass.<br>A) copper and
Q37: Chromates are strong<br>A) oxidizers.<br>B) bases.<br>C) acids.<br>D) metals.<br>E)
Q38: In a substitutional alloy,<br>A) one nonmetal substitutes
Q39: Identify the normal crystal structure at room
Q40: Why is zinc used to coat steel