Chemical Kinetics Mock Tests

How much time (in seconds) does it take for 99% of a first-order reactant to decompose if k = 3.3 × 10⁻³ s⁻¹? (log 100 = 2)

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

A radioactive isotope has a half-life of 5 days. What fraction of the original sample remains after 15 days?

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):

The decomposition of ammonia on a hot platinum surface is a zero-order reaction. If k = 2.5 × 10⁻⁴ mol L⁻¹ s⁻¹, what is the rate of production of N₂ and H₂?

If the half-life of a first order reaction is 100 seconds, the rate constant is:

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

The half-life of a second-order reaction is 100 seconds when the initial concentration is 0.1 M. What is the half-life when the initial concentration is 0.05 M?