Chemistry · PYQ NEET UG 2016(2)

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

1. \( \mathrm{CaF}_2 + \mathrm{H}_2\mathrm{SO}_4 \longrightarrow \mathrm{CaSO}_4 + 2\mathrm{HF} \)
2. \( \mathrm{Cu} + 2\mathrm{H}_2\mathrm{SO}_4 \longrightarrow \mathrm{CuSO}_4 + \mathrm{SO}_2 + 2\mathrm{H}_2\mathrm{O} \)
3. \( \mathrm{S} + 2\mathrm{H}_2\mathrm{SO}_4 \longrightarrow 3\mathrm{SO}_2 + 2\mathrm{H}_2\mathrm{O} \)
4. \( \mathrm{C} + 2\mathrm{H}_2\mathrm{SO}_4 \longrightarrow \mathrm{CO}_2 + 2\mathrm{SO}_2 + 2\mathrm{H}_2\mathrm{O} \)