1.

How is sulphuric acid prepared by lead chamber process? Give its principles.

Answer»

In this process SO2 is obtained by brning sulpher or Iron pyrites in air

S + O → SO2

4FeS2 + 11O2 → 2Fe2O3 + 8SO2

The obtained SO2 is oxidised SO2 + NO2 → SO3 + NO into SO3 by NO3 The obtained SO3  is treated is less then chamber crystals are formed.

2SO2 + NO + NO2 + H2O + O2 → 2(OHSO2.O.NO)

When champer crystals are appeared the flow of water vapours increases.

As a result of this H2SO4 is obtained

2(OHSO2.O.NO) + H2O → 2H2SO4 + NO + NO2



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