ElectrochemistryCalculation of Oxidation Number41Choose the best answerThe oxidation number of sulfur in SO₄²⁻ is:A−8B−6C+8D+6 Like 0 Discuss 0Share
ElectrochemistryOxidizing and Reducing Agents42Choose the best answerIn which reaction does H₂ act as an oxidizing agent?AH₂ + Cl₂ → 2HClBC₂H₄ + H₂ → C₂H₆C2Na + H₂ → 2NaHDN₂ + 3H₂ → 2NH₃ Like 0 Discuss 0Share
ElectrochemistryEMF of Electrochemical Cell43Choose the best answerThe driving potential that pushes electrons through the external circuit of a galvanic cell is called:AElectromotive force (emf)BResistanceCConductanceDElectrolysis Like 0 Discuss 0Share
ElectrochemistryElectrochemical Series and Metal Reactivity44Choose the best answerWhich metal does not liberate H₂ from a dilute non-oxidizing acid?AMgBPtCZnDCa Like 0 Discuss 0Share
ElectrochemistryBalancing Redox Reactions by Ion-Electron Method45Choose the best answerFor the reduction half-reaction MnO₄⁻ → Mn²⁺ in acidic medium, the number and position of electrons are:A5e⁻ on the rightB5e⁻ on the leftC3e⁻ on the rightD3e⁻ on the left Like 0 Discuss 0Share