Periodic TableSuccessive Ionization Energies1011Choose the best answerWhy is the second ionization energy of Mg greater than its first ionization energy?ANuclear charge increases after first ionization.BIonic radius increases.CThe remaining electrons experience stronger nuclear attraction.DThe number of protons decreases. Like 0 Discuss 0Share
Fundamental Principles of Organic ChemistryHydrocarbons and Their Derivatives1012Choose the best answerWhich conversion produces a hydrocarbon derivative?ACH₄ → CH₃ClBC₂H₆ → C₃H₈CC₂H₄ → C₂H₂DC₆H₆ → C₆H₆ Like 0 Discuss 0Share
Fundamental Principles of Organic ChemistryBuckminsterfullerene C₆₀1013Choose the best answerA C₆₀ molecule contains:A12 pentagons and 20 hexagonsB20 pentagons and 12 hexagonsC6 pentagons and 6 hexagonsDHexagons only Like 0 Discuss 0Share
KMU MDCAT 2024 Chemistry#Percentage Yield#Stoichiometry1014Choose the best answerHeating 24.8g of copper carbonate (CuCO₃) in a crucible produced only 13.9g of copper oxide (CuO). What is the percentage yield of copper oxide? (KMU MDCAT 2024)A81.79%B83.98%C86.87%D89.68% Like 0 Discuss 0Share
Chemical KineticsOrder of Reaction1015Choose the best answerFor a first-order reaction, which statement about its half-life is correct?AIt increases as the reaction proceedsBIt decreases with timeCIt remains constant during the reactionDIt depends directly on the initial concentration Like 3 Discuss 0Share