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In which of the following reactions conc. H2SO4 is used as an oxidising reagent?(i) CaF2 + H2SO4 → CaSO4 + 2HF(ii) 2HI + H2SO4 → I2 + SO2 + 2H2O(iii) Cu + 2H2SO4 → CuSO4 + SO2 + 2H2O(iv) NaCl + H2SO4 → NaHSO4 + HCl |
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Answer» (ii), (iii) (ii) 2HI + H2SO4 → I2 + SO2 + 2H2O (iii) Cu + 2H2SO4 → CuSO4 + SO2 + 2H2O |
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