Question

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

• 0.25 *-1
• 0.30 *-1
• 2.25 *-1
• 0.075 *-1

Answer 1

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

Explanation:

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

Thus, k = 0.25 *-1.