Is S8 (s) + 4Pb (s) —> 4PbS2 (s) a redox reaction? If so, what is the reducing agent and what is the oxidizing agent?
Yes, the reaction S8 (s) + 4Pb (s) -> 4PbS2 (s) is a redox reaction.
In this reaction, the sulfur (S8) is being reduced, and the lead (Pb) is being oxidized. Therefore, sulfur is the oxidizing agent and lead is the reducing agent.