Stoichiometry Stoichiometry MCQS#Atomic Structure#Isotopes2431Choose the best answerA sample contains 51 atoms of bromine-79 and 49 atoms of bromine-81. What does this show?ASome bromine atoms are unstableBBromine has two different nucleon numbersCBromine has two different proton numbersDBromine-81 has 2 additional electrons than bromine-79 Like 0 Discuss 0Share
Chemical BondingMolecular Geometry and Planarity2432Choose the best answerWhich molecule is not planar?ABenzeneBPCl₃CEtheneDBF₃ Like 0 Discuss 0Share
Aldehydes and KetonesPreparation by Ozonolysis of Alkenes2433Choose the best answerWhich alkene gives propanal and propanone on reductive ozonolysis?ACH₃CH₂CH=C(CH₃)₂BCH₃CH₂CH=CHCH₂CH₃CCH₃CH₂CH=CHCH₃D(CH₃)₂C=CHCH₃ Like 0 Discuss 0Share
StoichiometryPercentage Yield2434Choose the best answerIf actual yield is 15 g and theoretical yield is 20 g, what is the percentage yield?A50%B75%C80%D90% Like 0 Discuss 0Share
Atomic StructureQuantum Numbers2435Choose the best answerWhich set of quantum numbers is impossible?An = 1, ℓ = 0, mℓ = 0, mₛ = +½Bn = 1, ℓ = 1, mℓ = +1, mₛ = +½Cn = 2, ℓ = 1, mℓ = −1, mₛ = +½Dn = 2, ℓ = 0, mℓ = 0, mₛ = −½ Like 0 Discuss 0Share