XiMDCAT XI Complete Chemistry Grand Test#Cell Potential#Electrochemistry86Choose the best answerFor the cell A | A⁺(x M) || B⁺(y M) | B, the measured emf is +0.20 V. What is the overall cell reaction?AA⁺ + B → A + B⁺BA⁺ + e⁻ → A; B⁺ + e⁻ → BCA + B⁺ → A⁺ + BDThe cell reaction cannot be predicted Like 0 Discuss 0Share
ElectrochemistryElectrochemical Series and Metal Reactivity87Choose the best answerCoinage metals such as Cu, Ag and Au are relatively unreactive because they generally have:AStrongly negative reduction potentialsBStrongly positive oxidation potentialsCPositive reduction potentialsDZero reduction potentials Like 0 Discuss 0Share1
ElectrochemistryElectron Transfer and Oxidation Number Change88Choose the best answerWhich change involves transfer of five electrons per Mn atom?AMnO₄²⁻ → MnO₂BCrO₄²⁻ → Cr³⁺CMnO₄⁻ → Mn²⁺DCr₂O₇²⁻ → 2Cr²⁺ Like 0 Discuss 0Share
Sindh MDCAT 2020 Chemistry#Electrochemistry#Oxidation Number89Choose the best answerThe oxidation state of 'S' in (S₂O₃)²⁻ is: (Sindh MDCAT 2020)A+4B+6C-2D+2 Like 0 Discuss 0Share
ElectrochemistryOxidation and Reduction90Choose the best answerWhich statement is NOT true for the reaction Fe³⁺ + e⁻ → Fe²⁺?AFe³⁺ is reducedBThe oxidation state of Fe changesCFe³⁺ acts as an oxidizing agentDBoth Fe³⁺ and Fe²⁺ are anions Like 0 Discuss 0Share