For a reaction,

$\mathrm{A}+\mathrm{B} \longrightarrow$ product, it is found that rate law is $\mathrm{r}=\mathrm{k}[\mathrm{A}]^{1.5}[\mathrm{~B}]^{2.5}$. What is the order of reaction?

Which of the following ion exihibits maximum power of coagulation for positively charged Sol ?

Which among the following is NOT Allylic halide?

Identify product ' $B$ ' in the following sequence of reaction.

$$ \text { Aniline } \xrightarrow[273 \mathrm{~K}]{\mathrm{NaNO}_2+\mathrm{HCl}} \mathrm{~A} \xrightarrow[\Delta]{\mathrm{H}_2 \mathrm{O}} \mathrm{~B}+\mathrm{N}_2 \uparrow $$