For the reaction, `aA+bBrarr` products, rate =k[A][B] For which of the following mixtures of A and B will the initial rate be maximum? (1) a mixture consisting of 2mol of A and 2mol of B in a 2L vessel (2 ) a mixture consisting of 0.2 mol of A and 0.2mol of B in a 0.1 L vessel.

Explanation

In mixture (1) ,
`[A]=(2)/(2)=1 "mol .L"^(-1),[B]=(2)/(2)=1"mol.L"^(-1)`
and in mixture (2),
`[A]=(0.2)/(0.1)=2 "mol .L"^(-1),[B]=(0.2)/(0.1)=2"mol.L"^(-1)`
At a given temperature, the rate of a reaction increase with increase in concentrations of the reactions. Since the initial concentration of the reactants in case ( 2) are higher than those in (1), the initial rate of the reaction will be higher in case (2).