MET E 211 Review Quiz 24-25

What is the primary principle behind electrometallurgy?

• Chemical reactions driven by heat

• Electrochemical reactions driven by electricity

• Mechanical separation of metals

• Chemical reactions using solvents

Which of the following is NOT a common application of electrometallurgy?

• Extraction of iron from iron ore

• Refining of copper

• Production of aluminum

• Production of sodium

What is the main purpose of electrolysis in electrometallurgy?

• To separate metals from their ores

• To refine metals by removing impurities

• To produce alloys

• To coat metals with other materials

What is the role of the anode in an electrolytic cell?

• To release electrons and oxidize the metal ions

• To receive electrons and reduce the metal ions

• To act as a conductor of electricity

• To provide a surface for the deposition of metal

Answer explanation

What is the role of the cathode in an electrolytic cell?

• To release electrons and oxidize the metal ions

• To receive electrons and reduce the metal ions

• To act as a conductor of electricity

• To provide a surface for the deposition of metal

Answer explanation

Which of the following components of electrolytic cell has a negative polarity?

• Anode

• Cathode

• Electrode

• Anion

Answer explanation

It is the fluid medium carrying the metal ions in an electrolytic cell

• Lixiviant

• Electrolyte

• Aquaeous Solution

• Leachate

Answer explanation

In electrorefining metal containing copper and gold, which of the statements does not support why gold are deposited as anode sludge?

• Because all copper will oxidize first before gold will start to oxidize

• Because after all copper atoms have been oxidized, there are no more atoms that will hold gold in the anode

• Because gold has higher reduction potential

• Because copper has a higher reduction potential

If gold and silver has a 1.50 V and .80 V reduction potential, respectively, which between the two will lose electrons first?

• Ag

• Au

• None

• Both

In electrorefining material containing 2 (two) metals, which of the following loses electrons first?

• Metal with higher reduction potential

• Metal with lower reduction potential

• Both metal will lose electrons at the same time

• Copper will oxidize first