Which of the three most commonly used metals must be smelted from its ore minerals in the presence of carbon monoxide gas (from the burning of carbon-based charcoal)?
A)aluminum
B)copper
C)iron
D)None of the above are correct.

Question

Quizplus · Accepted Answer

Iron must be smelted from its ore minerals in the presence of carbon monoxide gas, which is produced by burning of carbon-based charcoal. Aluminum is usually produced by electrolysis, and copper can be smelted using other reducing agents such as sulfur dioxide or hydrogen gas.

Which of the Three Most Commonly Used Metals Must Be