Which of the following statements is /are correct?

In the formation of  $CC{l}_4$ from $CHC{l}_3$  and  $C{l}_2$, the rate of reaction is  $k\left[CHC{l}_3\right]{\left[C{l}_2\right]}^{\frac{1}{2}}$

The rate of the reaction in involving the thermal decomposition of dimethyl ether is   $k{\left[C{H}_{3}OC{H}_3\right]}^{3/2}$

In the formation of   $N{O}_2$ from  $NO\&O_2$, the rate of reaction  $k{\left[NO\right]}^2\left[O_2\right]$

In the decomposition of $H_2{O}_2$, the rate of the reaction is  $k\left[H_2{O}_2\right]$