H2SO4 acts as a strong oxidising agent. In which of the reaction, is it not acting as an oxidising agent?(a) C + 2H2SO4 → CO2 + 2SO2 + 2H2O(b) CaF2 + 2H2SO4 → CaSO4 + 2HF(c) S + 2H2SO4 → 3SO2 + H2O(d) Cu + 2H2SO4 → CuSO4 + SO2 + 2H2OAnswer: (b)
Question
H2SO4 acts as a strong oxidising agent. In which of the reaction, is it not acting as an oxidising agent?(a) C + 2H2SO4 → CO2 + 2SO2 + 2H2O(b) CaF2 + 2H2SO4 → CaSO4 + 2HF(c) S + 2H2SO4 → 3SO2 + H2O(d) Cu + 2H2SO4 → CuSO4 + SO2 + 2H2OAnswer: (b)
Solution
The answer is (b). In the reaction CaF2 + 2H2SO4 → CaSO4 + 2HF, H2SO4 is not acting as an oxidising agent. In this reaction, H2SO4 is acting as an acid, reacting with CaF2 (a base) to produce CaSO4 and HF. There is no transfer of electrons involved in this reaction, which is a characteristic of oxidation-reduction (redox) reactions where an oxidising agent is involved. Therefore, H2SO4 is not acting as an oxidising agent in this reaction.
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