StoichiometryMolar Volume at STP1566Choose the best answerWhat volume is occupied by 0.5 mol of an ideal gas at STP (273 K and 1 atm)?A22400 cm³B11200 cm³C22.4 mLDNone of these Like 0 Discuss 0Share
Atomic StructureHeisenberg Uncertainty Principle1567Choose the best answerWhich principle most directly contradicts the idea of an electron moving in a precisely defined Bohr orbit?APauli exclusion principleBPlanck quantum theoryCHeisenberg uncertainty principleDHund's rule Like 0 Discuss 0Share
Chemistry of HydrocarbonsFriedel–Crafts Alkylation1568Choose the best answerFriedel–Crafts alkylation introduces a:ANitro groupBSulphonic acid groupCAlkyl groupDCarboxyl group Like 1 Discuss 0Share
GasesBoyle's Law1569Choose the best answerWhich change makes the volume of a fixed amount of gas four times its initial value at constant temperature?ADoubling the pressureBHalving the pressureCQuadrupling the pressureDReducing the pressure to one-fourth Like 0 Discuss 0Share
MDCAT Chemistry Paper 2025#Activation Energy#Chemical Kinetics1570Choose the best answerThe formation of activated complex in a reaction is: (IBA MDCAT 2025)AExothermic processBEndothermic processCEither endo or exoDAlways energy released Like 0 Discuss 0Share