Order of a Reaction

In one component second order reaction, if the concentration of the reactant is reduced to half, the rate

For a zero order reaction, which of the following statement is false:

For a reaction $\mathrm{pA}+\mathrm{qB}\to$ products, the rate law expression is: $\mathrm{r}=\mathrm{k}\left[\mathrm{A}{]}^1\right[ \mathrm{B}{]}^{\mathrm{m}},$ then

The formation of ${\mathrm{NO}}_2\mathrm{F}$ from ${\mathrm{NO}}_2$ and ${\mathrm{F}}_2$ as per the reaction $2{\mathrm{NO}}_2\left(\mathrm{g}\right)+{\mathrm{F}}_2\left(\mathrm{g}\right)⟶2{\mathrm{NO}}_2\mathrm{F}\left(\mathrm{g}\right)$ is a second-order reaction, first order with respect to ${\mathrm{NO}}_2$ and first order with respect to ${\mathrm{F}}_2$. If ${\mathrm{NO}}_2$ and ${\mathrm{F}}_2$ are present in a closed vessel in ratio $2:1$ maintained at a constant temperature with an initial total pressure of $3 \mathrm{atm}$, what will be the total pressure in the vessel after the reaction is complete?

$\mathrm{A}+\mathrm{B}⟶$ Product,$\frac{\mathrm{dx}}{\mathrm{dt}}=\mathrm{k}{\left[\mathrm{A}\right]}^{\mathrm{a}}\left[\mathrm{B}\right]{}^{\mathrm{b}}$. If $\left(\frac{\mathrm{dx}}{\mathrm{dt}}\right)=\mathrm{k}$, then order is ______.

Which one of the following statement is not correct for the order of the reaction?

[IIT JEE 2005; CBSE PMT (Prelims) 2011]

The concentration of $\mathrm{R}$ in the reaction $\mathrm{R}\to \mathrm{P}$ was measured as a function of time and the following data was obtained:

$$\begin{gathered} \left[\mathrm{R}\right] 1.0 0.75 0.40 0.10 \\ \mathrm{Time} 0.0 0.05 0.12 0.18 \end{gathered}$$

What is the order of reaction?