Stoichiometry 11#Atomic Mass Comparison2581Choose the best answerElements A and B have atomic masses 10 u and 20 u. What is the atomic-mass ratio B:A?A1:2B2:1C1:1D4:1 Like 0 Discuss 0Share
Atomic StructureIsotopes2582Choose the best answerIsotopes of an element generally have:ASimilar chemical properties but different physical propertiesBSimilar chemical and physical propertiesCSimilar physical properties but different chemical propertiesDDifferent chemical and physical properties Like 0 Discuss 0Share
Chemical KineticsForward and Reverse Activation Energies2583Choose the best answerFor the exothermic reaction H₂ + Cl₂ → 2HCl, ΔH < 0. If Ef and Er are the forward and reverse activation energies, respectively:AEf > ErBEf < ErCEf = ErDΔH is unrelated to Ef and Er Like 0 Discuss 0Share
Industrial chemistry Industrial chemistry MCQS#Macromolecules#Polymers2584Choose the best answerWhich statement correctly differentiates addition polymerization from condensation polymerization?AAddition polymerization always needs two different monomersBCondensation polymerization never needs a catalystCAddition polymerization occurs without elimination of small moleculesDCondensation polymerization involves only free radicals Like 0 Discuss 0Share
StoichiometryRelative Atomic Mass2585Choose the best answerThe mass of an atom compared with 1/12 of the mass of a ¹²C atom is called:AOne moleBGram atomic massCAtomic numberDRelative atomic mass Like 0 Discuss 0Share