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Soundaryaa N from Modern Public School, asked a question
Subject: Chemistry , asked on 27/2/12

H2SO4 IS A OXIDISING AGENT, H2S IS A REDUCING AGENT, WHIL SO2 IS A REDUCING AGENT.EXPLAIN

EXPERT ANSWER

Anand Singh , Meritnation Expert added an answer, on 29/2/12

H 2 SO 4

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

H 2 S

It is a reducing agent since it can be oxidised easily into to sulphur

SO

It is a reducing agent since it can be also oxidised easily into to SO3

 

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