H2SO4 IS A OXIDISING AGENT, H2S IS A REDUCING AGENT, WHIL SO2 IS A REDUCING AGENT.EXPLAIN
H2SO4
Hot concentrated sulphuric acid is a moderately strong oxidising agent. In this respect, it is intermediate between phosphoric and nitric acids. Both metals and non-metals are oxidised by concentrated sulphuric acid, which is reduced to SO2.
Cu + 2 H2SO4(conc.) → CuSO4 + SO2 + 2H2O
3S + 2H2SO4(conc.) → 3SO2 + 2H2O
C + 2H2SO4(conc.) → CO2 + 2 SO2 + 2 H2O
H2S
It is a reducing agent since it can be oxidised easily into to sulphur
SO2
It is a reducing agent since it can be also oxidised easily into to SO3