Chemical KineticsEffect of Concentration on First-Order Reaction61Choose the best answerA gaseous reaction is experimentally first order overall. If the vessel volume is reduced to one-third at constant temperature, the reactant concentration becomes three times larger. The reaction rate therefore becomes:AOne-third as largeBTwo-thirds as largeCThree times as largeDSix times as large Like 0 Discuss 0Share
Chemical KineticsEffect of Concentration on Reaction Rate62Choose the best answerThe _____ the concentration of reactants, the _____ the probability of collisions and hence the _____ the reaction rate.ALower, greater, greaterBHigher, greater, higherCHigher, lower, higherDLower, lower, higher Like 0 Discuss 0Share
Chemical KineticsFirst-Order Reactions63Choose 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
BUMHS MDCAT 2025 Chemistry#Chemical Kinetics#Rate Constant64Choose the best answerUnit of rate constant for a particular reaction depends upon the: (BUMHS MDCAT 2025)Atemperature of reactionBactivation energy of reactionCmolecularity of reactionDorder of reaction Like 0 Discuss 0Share
Chemical KineticsArrhenius Plot and Activation Energy65Choose 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