SolidsFactors Affecting Lattice Energy21Choose the best answerNaF has a higher lattice energy than KF mainly because:ANa⁺ is larger than K⁺BNa⁺ is smaller than K⁺CF⁻ is larger in NaFDNaF is covalent Like 0 Discuss 0Share
SolidsAmorphous Solids22Choose the best answerWhich of the following is a non-crystalline solid?ACsClBNaClCCaF₂DGlass Like 0 Discuss 0Share
SolidsCrystalline Solids23Choose the best answerA crystalline solid characteristically has:AA sharp melting pointBNo melting pointCA completely disordered structureDNo long-range order Like 0 Discuss 0Share
UHS MDCAT 2023 ChemistryUHS MDCAT 2023 Past Paper#Electrical Conductivity of Metals#Solids24Choose the best answerIn metals, why electric conductivity decreases with the increase of temperature? (UHS MDCAT 2023)ABecause electron movement decrease with the increase of temperatureBBecause metal ions oscillations hinder electron movementCBecause electron direction changes at high temperatureDBecause they pass heat current through collision of electrons Like 0 Discuss 0Share
SolidsRadius Ratio Rule25Choose the best answerRadius ratio is mainly useful for predicting the:AColour of an ionic solidBCoordination number and geometry of an ionic crystalCMelting point of every solidDSolubility of every ionic compound Like 0 Discuss 0Share