Chemistry - Chemical Kinetics Question with Solution | TestHub

$\mathrm{a}\mathrm{G}+\mathrm{b}\mathrm{H}\to \mathrm{P}\mathrm{r}\mathrm{o}\mathrm{d}\mathrm{u}\mathrm{c}\mathrm{t}$
$\mathrm{r}\mathrm{a}\mathrm{t}\mathrm{e}\propto \left[\mathrm{G}{]}^{\mathrm{a}}\right[\mathrm{H}{]}^{\mathrm{b}}$
As when concentration of G is doubled keeping the concentration of H fixed, the rate is doubled it means order with respect to G is 1. When concentration of both the reactants G and H is doubled, the rate increases by eight times it means order with respect to H is 2.
Hence$\mathrm{a}=1,\mathrm{b}=2$
The overall order of reaction$=1+2=3$