name the reducing agent, oxidising agent, substance oxidised and substance reduced in the following redox reactions:
a. 2H2s + s02->3s + 2H2O
b Cr2O3 + 2Al -> 2Cr + Al2O3
c. Pbs + 4H202->PbSO4 + 4H2O
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A. Reducing agent, oxidized substance=H2S
Oxidizing agent, reduced substance=SO2
B. Reducing agent, oxidized substance=Al
Oxidizing agent, reduced substance=Cr2O3
C. Reducing agent, oxidized substance=PbS
Oxiding agent, reduced substance=H2O2
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