Fundamental Concepts of ChemistryReversible Physical Changes426Choose 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 Gases427Choose 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 Compounds428Choose 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 Atom429Choose 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
UHS MDCAT 2024 Chemistry#Alkyl Halides#Substitution and Elimination430Choose the best answerIdentify the correct statement related to substitution and elimination of alkyl halides:AStrong bases causes substitution in preference to eliminationBRole of leaving groups in elimination is similar to substitutionCSubstitution is favored more than elimination by decreasing solvent polarityDDecrease in temperature will favor elimination more than substitution Like 1 Discuss 0Share