MDCAT Chemistry Past Paper 2023#Covalent Solids#Solids256Choose the best answerWhich of the following is a covalent crystal? (MDCAT 2023)ANaClBKICMgBr₂DDiamond Like 0 Discuss 0Share
SINDH MDCAT 2019 CHEMISTRY#Enthalpy#Thermochemistry & Thermodynamics257Choose 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 Forces258Choose the best answerWhich process involves overcoming or weakening intermolecular attractions?ACondensationBFreezingCCrystallizationDEvaporation Like 0 Discuss 0Share
Chemical BondingElectron-Pair Repulsions259Choose 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
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Atomic Theory260Choose the best answerWhat does the Greek word “atomos” mean?AIndivisibleBElectrically neutralCInfinitely smallDChemically inert Like 0 Discuss 0Share