Oxidation of Sulphur dioxide into Sulphur trioxide in the absence of a catalyst is a slow process but this oxidation occurs easily in the atmosphere. Explain how this happens. Give chemical reactions for the conversion of SO2 into SO3.
Oxidation of Sulphur dioxide into Sulphur trioxide in the absence of a catalyst is a slow process but this oxidation occurs easily in the atmosphere. Explain how this happens. Give chemical reactions for the conversion of SO2 into SO3.
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1 Answer
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This is a Short Answers Type Questions as classified in NCERT Exemplar
The uncatalyzed oxidation of SO2 is a slow process. However, the presence of particulate matter in the polluted air catalyses the oxidation of SO2 to SO3. The reaction for the conversion can be given as-
2SO2 (g)+O2 (g)→2SO3 (g)
The reaction can be promoted by O3 or by H2O2.
SO2 (g)+O3 (g)→2SO3 (g)+O2 (g)
SO2 (g)+H2O2 (l)→H2SO4 (aq)
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