Chemistry - Chemical Kinetics Question with Solution | TestHub

$2\mathrm{A}+\mathrm{B}\to$ Product When conc. of $\mathrm{B}$ is doubled, the half life did not change, hence reaction is of first order w.r.t. $\mathrm{B}$. When concentration of $\mathrm{A}$ is doubled, reaction rate is doubled, hence reaction is of first order w.r.t. $\mathrm{A}$. Hence over all order of reaction is $1+1=2$ So, unit of rate constant ${\mathrm{mol}}^{-1}{\mathrm{lit}\mathrm{s}}^{-1}$. Hence, (A) is correct.