4.1.2 Extraction of metals and reduction

• What is metal extraction?

  Obtaining metals from ores
• Which metal is extracted from molten sodium chloride using electrolysis?

  Sodium
• Reduction with carbon is suitable for extracting less reactive metals.


  True
• Reduction in metal extraction involves removing oxygen from a metal compound.

  True
• Aluminum is extracted using electrolysis.


  True
• What reducing agent is used to extract iron from iron oxide?

  Coke
• What is the chemical formula for iron oxide?

  Fe₂O₃
• Electrolysis uses an electric current
• In reduction with carbon, metal oxides react with carbon to form carbon dioxide and the pure metal
• Match the extraction method with its process and application:

  Electrolysis ↔️ Uses electric current, Highly reactive metals

  Reduction with Carbon ↔️ Reacts metal oxides with carbon, Less reactive metals
• Name two metals that can be extracted using electrolysis.

  Sodium and aluminum
• What is the definition of reduction in metal extraction?

  Removing oxygen from a metal compound
• Coke is a reducing agent used to extract iron from iron oxide.

  True
• Electrolysis is used for extracting less reactive metals, while reduction with carbon is used for highly reactive metals.

  False
• Reduction allows us to obtain usable metals from their naturally occurring states
• Electrolysis is suitable for extracting metals like iron and copper.

  False
• Electrolysis is used for extracting highly reactive metals.


  True
• Reduction with carbon involves metal oxides reacting with carbon
• Match the extraction method with its application:

  Electrolysis ↔️ Highly reactive metals

  Reduction with Carbon ↔️ Less reactive metals
• Which metal is extracted from copper oxide using carbon as a reducing agent?

  Copper
• Electrolysis uses an electric current
• What is used as a reducing agent in the extraction of iron from iron oxide?

  Coke
• Iron oxide is reduced using carbon to produce iron and carbon dioxide
• Metal oxides react with carbon to form metal and carbon dioxide
• Iron oxide (Fe₂O₃) is reduced by coke to form iron and carbon dioxide
• Match the extraction method with its process:

  Electrolysis ↔️ Uses electric current

  Reduction with Carbon ↔️ Metal oxides react with carbon
• Electrolysis is suitable for extracting highly reactive metals like sodium and aluminum.


  True
• Reduction with carbon is suitable for extracting less reactive metals like iron and copper.

  True
• Metal extraction is the process of obtaining metals from their ores
• In reduction with carbon, carbon dioxide is a byproduct formed along with the pure metal.

  True
• Carbon, in the form of coke, is commonly used as a reducing agent
• Copper oxide reacts with carbon to form copper and carbon dioxide
• What is the reducing agent used to extract iron from iron oxide?

  Carbon
• In the reduction of iron oxide, coke is used as a reducing agent
• Match the extraction method with its application:

  Electrolysis ↔️ Highly reactive metals

  Reduction with Carbon ↔️ Less reactive metals
• Reduction is essential for extracting less reactive metals.

  True
• What are the two main methods of metal extraction?

  Electrolysis and reduction with carbon
• What is an example of metal extraction using electrolysis?

  Extracting sodium from molten sodium chloride
• What is an example of metal extraction using reduction with carbon?

  Extracting iron from iron oxide using coke
• What type of energy is used in electrolysis to separate metals from their compounds?

  Electric current