Hot concentrated sulphuric acid is a mod...

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

A

`CaF_2+H_2SO_4 rarr CaSO_42HF`

B

`Cu+2H_2SO_4 rarr CuSO_4+SO_2+2H_2O`

C

`2S+2H_2SO_4 rarr 2SO_2+2H_2O`

D

`C+2H_2SO_4 rarr CO_2+2SO_2+2H_2O`

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