Chemical KineticsFirst-Order Reactions31Choose the best answerWhich of the following is commonly cited as an example of a first-order reaction?AH₂ + Cl₂ → 2HClBNH₄NO₂ → N₂ + 2H₂OC2HI → H₂ + I₂D2NO + Cl₂ → 2NOCl Like 0 Discuss 0Share
Chemical KineticsArrhenius Plot and Activation Energy32Choose the best answerFor a plot of log k against 1/T, the magnitude of slope × 2.303R equals:AThreshold energyBFrequency factorCInternal energyDActivation energy Like 0 Discuss 0Share
Chemical KineticsFactors Affecting Reaction Rate33Choose the best answerDifferent reactants may react at different rates because of differences in their:AStructureBNature of bondingCPhysical stateDAll of the above Like 0 Discuss 0Share
Chemical KineticsUnits of Rate Constant34Choose the best answerWhich statement is correct?AReaction rate and first-order rate constant always have the same units.BIn every pseudo-order reaction, rate equals the rate constant.CThe unit of the rate constant depends on the overall order of reaction.DEvery photochemical reaction is first order. Like 0 Discuss 0Share
Chemical KineticsEffect of Temperature on Reaction Rate35Choose the best answerThe reaction rate doubles for every 10°C rise in temperature. By what factor does the rate increase when temperature rises from 10°C to 40°C?A2B4C8D16 Like 0 Discuss 0Share