Chemical KineticsOverall Order of Reaction31Choose the best answerFor the rate law Rate = k[A]¹ᐟ²[B]³ᐟ², the overall order of reaction is:A1.5B2C3D1 Like 0 Discuss 0Share
Chemical KineticsInstantaneous and Average Rate32Choose the best answerWhich statement is false?AFor a typical reaction whose rate decreases with time, the initial instantaneous rate is high.BThe activated complex has a very short lifetime.CA tangent to a concentration–time curve gives the average rate.DOnly a fraction of molecular collisions are effective. Like 0 Discuss 0Share
Chemical KineticsNature of Reaction and Reaction Rate33Choose the best answerWhich type of reaction is generally slower than rapid ionic reactions such as neutralization and double displacement?ANeutralizationBRedox reactionCDouble displacementDAll are always equally fast Like 0 Discuss 0Share
Chemical KineticsRate Law from Reaction Mechanism34Choose the best answerConsider the mechanism: Step 1: 2NO ⇌ N₂O₂ (fast equilibrium) Step 2: N₂O₂ + H₂ → N₂O + H₂O (slow) Step 3: N₂O + H₂ → N₂ + H₂O (fast) The overall rate law is:ARate = k[NO]²[H₂]BRate = k[N₂O₂][H₂]CRate = k[NO]²DRate = k[N₂O₂][H₂]² Like 0 Discuss 0Share
Chemical KineticsArrhenius Equation and Frequency Factor35Choose the best answerIn the Arrhenius equation k = Ae⁻ᴱᵃ⁄ᴿᵀ, the pre-exponential factor A depends on:ANature of reacting moleculesBMolecular structure and orientationCCollision frequencyDAll of the above Like 0 Discuss 0Share