LiquidsVolatility191Choose the best answerWhich liquid is the most volatile?ADiethyl etherBWaterCEthanolDEthylene glycol Like 0 Discuss 0Share
MDCAT Chemistry Past Paper 2023#Covalent Solids#Solids192Choose the best answerWhich of the following is a covalent crystal? (MDCAT 2023)ANaClBKICMgBr₂DDiamond Like 0 Discuss 0Share
SINDH MDCAT 2019 CHEMISTRY#Enthalpy#Thermochemistry & Thermodynamics193Choose the best answerThe change in heat energy of a chemical reaction at constant temperature and pressure is called: (Sindh MDCAT 2019)AEnthalpy changeBHeat of sublimationCInternal energy changeDHeat of formation Like 0 Discuss 0Share
LiquidsEvaporation and Intermolecular Forces194Choose the best answerWhich process involves overcoming or weakening intermolecular attractions?ACondensationBFreezingCCrystallizationDEvaporation Like 0 Discuss 0Share
Chemical BondingElectron-Pair Repulsions195Choose the best answerWhich pair of molecules contains two lone pairs on the central atom and therefore shows the maximum variety of electron-pair repulsions?AH₂O onlyBH₃O⁺ onlyCH₂S onlyDH₂O and H₂S Like 0 Discuss 0Share