Question

Which is the reducing agent,substance oxidized,reducing agent and substance reduced in (Mg+H2SO4----------MgSO4+H2)

Answer 1

reducing agent mg
subs oxidized mg
oxidising agent H2
sibs reducedH2

Answer 2

Mg is oxidised and a reducing agent where as sulphur is neither oxidised nor reduced.. so there is no oxidising agent... hence its a pure oxidation reaction