ElectrochemistryFuel Cells16Choose the best answerIn hydrogen–oxygen fuel cells used in space applications, the useful by-product obtained is:ANiBPbCH₂ODNaOH Like 0 Discuss 0Share
ElectrochemistryStandard Cell Potential17Choose the best answerGiven: Ag⁺ + e⁻ → Ag E° = +0.80 V Al³⁺ + 3e⁻ → Al E° = −1.67 V The standard cell potential is:A+2.47 VB+0.87 VC−0.87 VD+5.81 V Like 0 Discuss 0Share
MDCAT Chemistry Past Papers 2024Sindh MDCAT Chemistry Past Paper 2024#Electrochemistry#Galvanic Cell18Choose the best answerFuel cell is a typical galvanic cell which is based on reaction between:AHydrogen and copperBMethane and oxygenCHydrogen and oxygenDNitrogen and oxygen Like 0 Discuss 0Share
ElectrochemistryStandard Hydrogen Electrode19Choose the best answerStandard conditions for the hydrogen electrode include:AH₂ at approximately 1 bar pressureBUnit activity of H⁺CTemperature commonly specified as 298 KDAll of these Like 0 Discuss 0Share
ElectrochemistryStandard Hydrogen Electrode20Choose the best answerSHE acts as an anode with Cu but as a cathode with Zn because:AZn has a lower E°red than H⁺/H₂, while Cu has a higher E°redBZn has a higher E°red than CuCCu has a lower E°red than ZnDHydrogen always acts only as an anode Like 0 Discuss 0Share