Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Frequency271Choose the best answerWhat is the SI unit of frequency?AJouleBHertzCMetreDSecond Like 0 Discuss 0Share
BasicsStoichiometry #Atomic Structure#Isotopes272Choose the best answerWhy do isotopes of the same element usually have similar chemical properties?AThey have the same mass numberBThey have the same electronic configurationCThey have the same number of neutronsDThey have different atomic numbers Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Electrons273Choose the best answerWhat is the total number of electrons present in 1.6 g CH₄?A6.022 × 10²³B1.6 × 10²³C1.6 × 10²²D6.022 × 10²² Like 0 Discuss 0Share
LiquidsDistribution of Molecular Energies274Choose the best answerThe molecular energies in a liquid are:ANot equally distributedBMinimum for all molecules at the bottomCMaximum for all molecules in the middleDNegligible at the surface Like 0 Discuss 0Share
Fundamental Principles of Organic ChemistryCommon and IUPAC Names of Hydrocarbons275Choose the best answerThe IUPAC name of isopropyl ethylene is:A2-Methylbut-1-eneB3-Methylbut-1-eneC2-Methylbut-2-eneDPent-1-ene Like 0 Discuss 0Share