ElectrochemistrySpontaneity of Electrochemical Reactions41Choose the best answerWhich reaction is spontaneous under standard conditions?AZn + Cu²⁺ → Zn²⁺ + CuB2NaCl(l) → 2Na + Cl₂CZn²⁺ + Cu → Zn + Cu²⁺D2Fe(OH)₃ → 2Fe + 3O₂ + 3H₂ Like 0 Discuss 0Share
SZABMU MDCAT 2025 Chemistry#Electrochemistry#Oxidation Number42Choose the best answerIn the given reaction CH₃OH → HCOOH, oxidation state of carbon changes from: (SZABMU MDCAT 2025)A-2 to 0B-2 to +2C-3 to +2D0 to +2 Like 0 Discuss 0Share
ElectrochemistryFuel Cells43Choose the best answerIn hydrogen–oxygen fuel cells used in space applications, the useful by-product obtained is:ANiBPbCH₂ODNaOH Like 0 Discuss 0Share
ElectrochemistryStandard Cell Potential44Choose 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 Cell45Choose 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