If the concentration of a reactant 'A' is doubled and the rate of its reaction increase by a factor of 2, the order of reaction with respect to 'A' is

Options

A. 1 st
B. zero
C. 2 nd
D. 3 rd

Answer

A

Explanation

Using the relation, rate `prop ("conc. of reactant")^(n)` where n is order of reaction.
In the question, since rate is directly proportional to the conc. Of reactant, hence the reaction is of first order.