UHS MDCAT 2024 Chemistry#Activating Groups#Benzene & Aromatic Compounds456Choose the best answerWhich of the following is an example of substituent group which release electrons to benzene ring:A-CNB-NR₃⁺C-NH₂D-NO₂ Like 1 Discuss 0Share
Atomic StructureEnergy of Hydrogen Atom457Choose the best answerThe negative electronic energy of a hydrogen atom indicates that:AThe electron has maximum energy at n = ∞BA bound electron has greater energy than a free electronCA bound electron has lower energy than a free electron at rest at infinityDElectronic energy decreases as the electron moves away from the nucleus Like 0 Discuss 0Share
UHS MDCAT 2024 Chemistry#Alkyl Halides#Substitution and Elimination458Choose the best answerIdentify the correct statement related to substitution and elimination of alkyl halides:AStrong bases causes substitution in preference to eliminationBRole of leaving groups in elimination is similar to substitutionCSubstitution is favored more than elimination by decreasing solvent polarityDDecrease in temperature will favor elimination more than substitution Like 1 Discuss 0Share
StoichiometryLimiting Reagent and Mole–Mole Stoichiometry459Choose the best answerFor the reaction: 2A + 3B → 4C 3 mol A and 5 mol B are mixed. How many moles of C are formed?A8 molB5 molC6 molD6.67 mol Like 0 Discuss 0Share
Chemical KineticsRate of Appearance of Products460Choose the best answerFor the reaction 2A ⇌ 4B + C, the concentration of B increases by 5 × 10⁻³ mol L⁻¹ in 10 s. The rate of appearance of B is:A5 × 10⁻⁴ mol L⁻¹ s⁻¹B5 × 10⁻³ mol L⁻¹ s⁻¹C6 × 10⁻⁵ mol L⁻¹ s⁻¹D4 × 10⁻⁴ mol L⁻¹ s⁻¹ Like 0 Discuss 0Share