Which substance is a common reducing agent used in the production of metals from ores?
A)C
B)Na₂Cr₂O₇
C)H₂O
D)LiBr

Question

Quizplus · Accepted Answer

Carbon (C) is a common reducing agent used in the production of metals from ores through the process of smelting or reduction. In these processes, carbon reacts with the metal oxide to form carbon dioxide and the pure metal. This is because carbon has a high affinity for oxygen, and removes it from the metal oxide to produce the pure metal. Therefore, A is the correct choice.

B) Na₂Cr₂O₇ is a strong oxidizing agent, and is not used as a reducing agent.
C) H₂O is not a reducing agent, but can be a source of oxygen in certain chemical reactions. 
D) LiBr is not a reducing agent, but a salt that is used in organic synthesis and as a sedative.

Which Substance Is a Common Reducing Agent Used in the Production