Question

For the first order reaction A → B, the rate constant is 0.25 s^-1, if the concentration of A is reduced to half, the value of rate constant will be ________.

Options

• 0.25 s^-1

• 0.30 s^-1

• 2.25 s^-1

• 0.075 s^-1

Answer 1

For the first order reaction A → B, the rate constant is 0.25 s^-1, if the concentration of A is reduced to half, the value of rate constant will be 0.25 s^-1.

Explanation:

Rate constant for first order reaction is independent of initial concentration.

Thus, k = 0.25 s^-1.