Chemical KineticsAverage Rate of Reaction16Choose the best answerThe concentration of a reactant decreases from 0.20 mol dm⁻³ to 0.10 mol dm⁻³ in 10 min. Its average rate of disappearance is:A0.01 MB2 × 10⁻² mol dm⁻³ min⁻¹C0.01 mol dm⁻³ min⁻¹D1 mol dm⁻³ min⁻¹ Like 0 Discuss 0Share
Chemical KineticsDetermination of Rate Law17Choose the best answerDoubling [A] makes the rate four times larger, while doubling [B] makes it twice as large. The rate law is:ARate = k[A][B]BRate = k[A]²[B]CRate = k[A]²[B]²DRate = k[A][B]² Like 0 Discuss 0Share
Chemical KineticsStoichiometric Relationship of Reaction Rates18Choose the best answerFor the reaction 2A + B → A₂B, the rate of disappearance of A is:AHalf the rate of disappearance of BBEqual to the rate of disappearance of BCTwice the rate of disappearance of BDEqual to the rate of formation of A₂B Like 0 Discuss 0Share
Chemical KineticsFactors Affecting Reaction Rate19Choose 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 Constant20Choose 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