Areaction was found to be zero order in a. increasing the concentration of a by a factor of 3 will cause the reaction rate to
(a) remain constant
(b) decrease by a factor of the cube root of 3
(c) increase by a factor of 9
(d) triple increase by a factor of 27

Increasing the concentration of A by a factor of 3 will cause the reaction rate to (A) remain constant.

Explanation:

If the reaction order for A is zero, it means that the rate of the reaction is independent of A. The rate law would be:

r = k . [A]⁰ = k

where,

r is the rate of the reaction

k is the rate constant

and [A] is raised to its reaction order (zero)

Increasing the concentration of A by 3 would result in no effect on the reaction rate, as we can see in the rate law:

r = k . [3 A]⁰ = k .1 = k