Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show its oxidizing behaviour?

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C+2H2SO4→CO2+2SO2+2H2O

CaF2+H2SO4→CaSO4+2HF

Cu+2H2SO4→CuSO4+SO2+2H2O

3S+2H2SO4→3SO2+2H2O

answer is B.

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Detailed Solution

CaF2+H2SO4→CaSO4+2HF is double decomposition reaction. There is no change in oxidation number of any element.

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