ElectrochemistryEMF of Electrochemical Cell46Choose 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 Reactivity47Choose the best answerWhich metal does not liberate H₂ from a dilute non-oxidizing acid?AMgBPtCZnDCa Like 0 Discuss 0Share
MDCAT Chemistry Paper 2025#Electrochemistry#Standard Hydrogen Electrode48Choose the best answerWhen SHE is connected with Cu electrode using salt bridge and external wire: (IBA MDCAT 2025)ACu reducesBCu²⁺ reducesCH⁺ reducesDH₂ reduces Like 3 Discuss 0Share
ElectrochemistryBalancing Redox Reactions by Ion-Electron Method49Choose 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
ElectrochemistryElectrolysis of Aqueous Solutions50Choose the best answerDuring electrolysis of aqueous KNO₃, H₂ is produced at the cathode instead of K because:AK⁺ has a more positive reduction potential than H⁺BPotassium is less reactive than hydrogenCReduction of water/H⁺ is easier than reduction of K⁺DPotassium is already in the elemental state Like 0 Discuss 0Share