Stoichiometry Stoichiometry MCQS#Mole Concept871Choose the best answerFor which substance are molecular mass and formula mass numerically the same?A56 amu CaCO₃B40 g MgOC17 amu NH₃DA and B Like 0 Discuss 0Share
StoichiometryAtomic Mass Unit and Relative Atomic Mass872Choose the best answerIf 1 u were defined as 1/6 instead of 1/12 of the mass of a ¹²C atom, numerical relative atomic masses would:ABecome halfBDoubleCRemain unchangedDBecome zero Like 0 Discuss 0Share
Atomic StructureIsobars873Choose the best answerWhich pair represents isobars?A¹³₆C and ¹³₇NB¹³₆C and ¹⁴₇NC¹⁴₇N and ¹⁵₈OD¹³₇N and ¹⁵₈O Like 0 Discuss 0Share
Alkyl HalidesNucleophilic Substitution874Choose the best answerIn which reaction does an inorganic nucleophile attack an alkyl halide?AC₆H₆ + HNO₃ → C₆H₅NO₂ + H₂OBCH₃CH=CH₂ + Br₂ → CH₃CHBrCH₂BrCCH₃CH₂NH₂ + HCl → CH₃CH₂NH₃ClDCH₃CH₂Br + OH⁻ → CH₃CH₂OH + Br⁻ Like 1 Discuss 0Share
LiquidsVapour Pressure and Boiling Point875Choose the best answerA liquid tends to have a lower boiling point when it has:AHigh vapour pressure at a given temperatureBVery strong intermolecular forcesCVery low vapour pressureDVery high heat of vaporization Like 0 Discuss 0Share