SINDH MDCAT 2019 CHEMISTRY#Energy Units#Thermochemistry & Thermodynamics2981Choose the best answerOne Calorie is equivalent to: (Sindh MDCAT 2019)A0.4184 JB41.84 JC4.184 JD418.4 J Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry2982Choose the best answerWhat volume of O₂ at STP (273 K and 1 atm) is obtained by electrolysis of 3.6 g H₂O? 2H₂O → 2H₂ + O₂A2.24 dm³B4.48 dm³C1.12 dm³D1120 dm³ Like 0 Discuss 0Share
ElectrochemistryFuel Cells2983Choose the best answerA commonly used electrolyte in an alkaline hydrogen–oxygen fuel cell is:AKOHBNaCl(aq)CNaNO₃DMolten NaCl Like 0 Discuss 0Share
Chemical BondingBond Formation and Stability2984Choose the best answerWhen atoms form a stable compound, their energy is generally:AHigher than that of the separated atomsBEqual to that of separated atomsCLower than that of separated atomsDAlways zero Like 0 Discuss 0Share
Chemistry of HydrocarbonsWurtz Reaction2985Choose the best answerThe Wurtz reaction is mainly useful for preparing:AAlcoholsBSymmetrical alkanesCKetonesDCarboxylic acids Like 0 Discuss 0Share