XIIMDCAT Chemistry Test#Chemical Bonding#Hybridization1451Choose the best answerIn sp² hybridization, the unhybridized p orbital is oriented:AIn the same plane as the three sp² orbitalsBAt 45° to the plane of the sp² orbitalsCParallel to the plane of the sp² orbitalsDPerpendicular to the plane of the sp² orbitals Like 0 Discuss 0Share
Fundamental Concepts of ChemistryPhysical Changes1452Choose the best answerA physical change is one in which:AChemical composition changesBPhysical state or another physical property may changeCNew chemical substances are always formedDChemical bonds must always be broken Like 0 Discuss 0Share
Chemical BondingBond Length1453Choose the best answerThe correct increasing order of bond length is:AC–H < C=C < C–O < C–CBC–H < C–O < C=C < C–CCC=C < C–H < C–O < C–CDC–H < C=C < C–C < C–O Like 1 Discuss 0Share
Carboxylic AcidsAcid Strength and pKa1454Choose the best answerWhich of the following is the strongest acid?AHCOOH, pKa = 3.77BC₆H₅COOH, pKa = 4.22CCH₃COOH, pKa = 4.71DCH₃CH₂COOH, pKa = 4.88 Like 0 Discuss 0Share
StoichiometryLimiting Reagent1455Choose the best answerFor the reaction: A + 2B → AB₂ 5 mol A and 2 mol B are mixed. Which is the limiting reagent?AABBCAB₂DCannot be determined Like 0 Discuss 0Share