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Redox Reactions — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryRedox Reactions5 Marks
Question
Write correctly the balanced equations for the following redox reactions using half reactions.

  1. H2S+ Fe3+ → Fe2+ + S + H+ 
  2. I + $\text{IO}^-_3$ + H+ → I2 + H2O 
  3. Bi(s)+ $\text{NO}_3^-$ + H+ → NO2 + Bi3+ + H2O
  4. I- + O2(g) + H2O → I2 + OH-

State what is oxidised to what and what is reduced to what in the reactions expressed by the equations?

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