SolidsAmorphous Solids411Choose the best answerWhich of the following is an amorphous solid?AGlassBNaClCCsClDCaF₂ Like 0 Discuss 0Share
Fundamental Concepts of ChemistryReversible Physical Changes412Choose the best answerWhich is a reversible physical change?AGrinding wood into sawdustBCutting down a treeCHeating an iron nail and allowing it to coolDBoth A and B Like 0 Discuss 0Share
StoichiometryMolar Properties of Gases413Choose the best answerWhich property is NOT generally the same for one mole of different ideal gases at STP?AVolumeBMolar massCNumber of moleculesDNone of these Like 0 Discuss 0Share
UHS MDCAT 2024 Chemistry#Activating Groups#Benzene & Aromatic Compounds414Choose the best answerWhich of the following is an example of substituent group which release electrons to benzene ring:A-CNB-NR₃⁺C-NH₂D-NO₂ Like 1 Discuss 0Share
Atomic StructureEnergy of Hydrogen Atom415Choose the best answerThe negative electronic energy of a hydrogen atom indicates that:AThe electron has maximum energy at n = ∞BA bound electron has greater energy than a free electronCA bound electron has lower energy than a free electron at rest at infinityDElectronic energy decreases as the electron moves away from the nucleus Like 0 Discuss 0Share