Statement-I: According to collision theory, the collisions between the activated molecules lead to product formation.

Statement-II:  A first order reaction cannot be bimolecular.

I: Only the collisions between activated molecules lead to product formation.

                           $$\begin{gathered} \mathrm{A}+\mathrm{A}\to \mathrm{No} \mathrm{product} \\ \mathrm{A}+{\mathrm{A}}^{*}\to \mathrm{No} \mathrm{product} \\ {\mathbf{A}}^{\mathbf{*}}\mathbf{+}{\mathbf{A}}^{\mathbf{*}}\mathbf{\to }\mathbf{Product} \\ \mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{ }\mathbf{where} \\ \mathbf{A}\mathbf{ }\mathbf{=}\mathbf{Normal}\mathbf{ }\mathbf{molecule} \\ {\mathbf{A}}^{\mathbf{*}}\mathbf{=}\mathbf{Activated}\mathbf{ }\mathbf{molecule} \end{gathered}$$

II: $\mathrm{A}\left(\mathrm{excess}\right)+\mathrm{B}\stackrel{\mathrm{slow}}{\to }\mathrm{products};$

       Molecularity = 2; order = 1.