Chemistry - Chemical Kinetics Question with Solution | TestHub

$2\mathrm{A}+\mathrm{B}\to$Products
According to question : Rate of reaction is proportional to$\left[\mathrm{B}\right]$as increase in rate is double when$\left[\mathrm{B}\right]$is doubled.
Rate of reaction proportional to$\left[\mathrm{A}\right]$$\left[\mathrm{B}\right]$as increase in rate is 8 times when concentration of both reactant is doubled. It means that order of reaction is 3 and overall rate reaction should be$\mathrm{r}=\mathrm{K}\left[\mathrm{A}{]}^2\right[\mathrm{B}]$