Question

The overall order of reaction can be fractional or even negative.
A. True
B False

Answer 1

rder of reaction is the sum of the powers of concentration of reactants in the rate law expression. It is an experimental value.

Complete answer:
The order of a reaction depends on the concentration of the reactants used in a reaction. The order is the sum total of all the power of concentration of reactants. The order of reaction affects the rate of a reaction.
Let us consider a reaction$A + B \to C$ . The rate of the reaction is written as $r = k{\left[ A \right]^x}{\left[ B \right]^y}$ , where $r$ indicates the rate of the reaction, $\left[ A \right]$ and $\left[ B \right]$ are concentrations of the reactants used, $k$ is the rate constant of reaction, $x$ and $y$ are the exponents of concentration also called as the partial order of the reaction.
Then the overall order of the reaction is obtained by adding the individual order of the reactants used. Thus the order is equal to $x + y$.
The order of the reaction solely defined by the concentration of reactant used and not on the concentration of the products formed. It is independent of the stoichiometric coefficients of the reactants. The order of the reaction is zero, or positive integer or a fraction which depends on the concentration of the individual reactants.
Hence the given statement is false
So, the correct answer is “Option B”.

Note:
The order of a reaction is determined experimentally. Several methods are employed to determine the order of the reaction. Some of them are initial rate method, integral method and differential method. The differential method is the easiest method to calculate the overall order of the reaction.