Verified Answer :

The overall order of a reaction is directly
related to the reaction mechanism of the reaction. The reaction mechanism is
defined by the reaction rate equation. In this case, we are given by the
equation, Rate=k. The order of this reaction is zero since the rate is
not dependent on the concentration of reactants or products. 

Answer: The order of the reaction for the given rate law is zero.

Explanation:

Order of the reaction is defined as the sum of the exponents or powers to which the molar concentration in the rate law equation are raised to express the observed rate of the reaction. For a given general equation:

\(aA\rightarrow cC+dD\)

Rate law is given as: \(Rate=k[A]^a\)

Order of the reaction will be = a

For the given rate law: \(Rate=k[A]^0\)

In the rate law, anything raised to power 0 is 1.

Order of the give rate law = 0

And, hence, the order of the reaction will be zero.

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