Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Hund's Rule1221Choose the best answerWhy are singly occupied degenerate orbitals relatively stable?AMinimize interelectronic repulsion and provide exchange-energy stabilizationBIncrease electron-electron repulsionCPossess higher intrinsic energyDEliminate nuclear attraction Like 1 Discuss 0Share
StoichiometryLimiting Reagent1222Choose the best answerIn the reaction: 4NH₃ + 5O₂ → 4NO + 6H₂O 1 mol NH₃ is mixed with 1 mol O₂. Which statement is correct?AExactly 1 mol H₂O is producedBAll O₂ is consumedC1.5 mol NO is formedDAll NH₃ is consumed Like 0 Discuss 0Share
MDCAT Chemistry Past PapersIBA MDCAT Chemistry Paper Reconduct 2024#Gases#Pressure Units1223Choose the best answerThe pressure 14.7 psi is equal to: (IBA MDCAT Reconduct 2024)A1 torrB1 pascalC1 atmD1 Nm Like 0 Discuss 0Share
Atomic Structure STBAtomic Structure MCQs (STB)#Atomic Structure#Planck Quantum Theory1224Choose the best answerWho introduced quantum theory in 1900?AAlbert EinsteinBMax PlanckCNiels BohrDWilhelm Roentgen Like 0 Discuss 0Share
GasesCompressibility Factor and Positive Deviation1225Choose the best answerPositive deviation from ideal behaviour, Z > 1, is mainly associated with:ADominant attractive forcesBMolecular-volume and repulsive effectsCZero molecular volumeDComplete absence of collisions Like 0 Discuss 0Share