In a second order reaction, first order in each reactant `A` and `B`, which one of the following reactant mixtures will provide the highest initial rate?

Options

A. `0.1` mol of X and `0.1` mol of Y in `0.2` L of solvent
B. `0.2` mol of X and `0.2` mol of Y in `0.1` L of solvent
C. `1.0` mol of X and `1.0` mol of Y in `1.0` L of solvent
D. `0.1` mol of X and `0.1` mol of Y in `0.1` L of solvent

Answer

B

Explanation

More concentration, more is the rate of reaction Maximum concentration is when `0.2` mol of x and 0.2 mol of Y are present in 0.1 L of solvent Here `[X] = 2 "mol L"^(-1) and [Y]=2 "mol L"^(-1)`.