Chemistry
Grade-8
Easy
Question
Which of the following can be used to extract metals from their oxides?
- Coke
- Coal
- Charcoal
- Graphite
Hint:
The residue left behind after burning wood.
The correct answer is: Charcoal
The correct option is c)Charcoal.
Coal therefore plays a triple role in steelmaking. It is a reducing agent that converts pig iron into coke. An energy source that drives processes by breaking molecular bonds. The carbon is a source of the final product (steel is an alloy of carbon and iron).
If the metal is less reactive than carbon, it can be extracted out of the oxide by heating with carbon. Carbon replaces metals from compounds and removes oxygen from oxides. This leaves the metal behind.
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