Chemical KineticsRate of Appearance of Products16Choose 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
Chemical KineticsReaction Order and Molecularity17Choose the best answerWhich statement about reaction order and molecularity is false?AReaction order may be zero, positive, negative or fractional.BMolecularity is a theoretical concept applied to an elementary step.CReaction order can never equal a stoichiometric coefficient.DMolecularity is a whole number. Like 0 Discuss 0Share
Chemical KineticsFractional-Order Reactions18Choose the best answerIn the commonly cited kinetic example of conversion of chloroform to carbon tetrachloride, the reaction order is:A1B1.5C2D3 Like 0 Discuss 0Share
Chemical KineticsDetermination of Reaction Order19Choose the best answerIf doubling [A] increases the rate fourfold and tripling [A] increases the rate ninefold, the rate is proportional to:A[A]B[A]²C√[A]D[A]³ Like 0 Discuss 0Share
Chemical KineticsFirst-Order Rate Constant20Choose the best answerFor a first-order reaction, [A] = 2.0 mol dm⁻³ and Rate = 0.6 mol dm⁻³ s⁻¹. The rate constant is:A1 s⁻¹B0.3 s⁻¹C0.6 s⁻¹D0.9 s⁻¹ Like 0 Discuss 0Share