Reaction Order

What are the units of rate constant, k for the rate law: Rate = k [A]² [B]?

• M^-3 s^-1

• s^-1

• M^-1 s^-1

• M^-2 s^-1

• increase ; 5

• increase ; 2

• increase ; 6

• increase ; 12

The time required for the concentration of reactant to fall down to half of its value is know as ______?

• Half-life

• Reaction rate

• Rate law

• Differential rate equation

The decomposition of carbon disulfide, CS₂ is first order reaction with rate constant, k = 2.8 x 10^-7 s^-1 at 1000^oC. Calculate the half-life of this reaction at 1000^oC.

• 2.8 x 10^-7 s

• 1.4 x 10^-7 s

• 2.5 x 10⁶ s

• 3.8 x 10⁵ s

The value of rate constant, k of a reaction is 2.75 x 10^-20 s^-1. What is the order of the reaction?

• Zero Order

• First Order

• Second Order

• Third Order

This plot correspond to _______ order.

• zero

• first

• second

• third