Chemical Kinetics Mock Tests

For a reaction A → B, the rate becomes 9 times when the concentration of A is tripled. The order of the reaction is:

A first-order reaction is 50% complete in 30 minutes. How much time will it take to become 87.5% complete?

The rate constant of a first-order reaction is 6.93 × 10⁻³ min⁻¹. The time required for the concentration to decrease from 0.8 M to 0.2 M is:

The rate constant of a first-order reaction is 6.93 × 10⁻³ s⁻¹. The time required for 75% completion of the reaction is (log 4 = 0.602):

If doubling the concentration of a reactant doubles the rate of reaction, the reaction is:

The half-life of a first-order reaction is 69.3 s. The rate constant of the reaction is:

The unit of rate constant for a second-order reaction is:

For a first-order reaction, the half-life period is 693 s. The value of the rate constant (in s⁻¹) is: