Question

Time required to complete half of the reactant in a zero order reaction is equal to a/(2k).

• A. True
• B. False

Answer 1

The correct option is A True

The statement is true.
Time required to complete half of the reactant in a zero order reaction is equal to a/(2k).

The half life ($t_{1/2}$) of a reaction is the time required for the concentration of the radioactive substance to decrease to one-half of its original value. The half-life of a zero-order reaction can be derived as follows:

For a reaction involving reactant $a$ and from the definition of a half-life, $t_{1/2}$ is the time it takes for half of the initial concentration of reactant $a$ to react. These new conditions can be substituted into the integrated rate law form to obtain the following:

$1/2\left[a\right]=-k{t}_{1/2}+a$

Solving for $t_{1/2}$gives the following:

$t_{1/2}=a/\left(2k\right)$