10. Biomolecules — Chemistry STD 12 Science — Question

$(I)$  $\begin{matrix}
   \begin{matrix}
   \,\,\,Br  \\
   |  \\
\end{matrix}  \\
   Ph-C-Ph  \\
   |  \\
   \,\,\,\,\,\,C{{H}_{3}}  \\
\end{matrix}$

$(II)$  $\begin{matrix}
   Br  \\
   |\,\,\,  \\
   Ph-CH-Ph  \\
\end{matrix}$

$(III)$  $\begin{matrix}
   Ph-CH-C{{H}_{3}}  \\
   |\,\,\,\,\,\,\,  \\
   Br\,\,\,\,\,\,  \\
\end{matrix}$

$(IV)$  $PhVH_2Br$

$A \to {\text{Product ;}}\,\, - \frac{{d[A]}}{{dt}} = {k_1}{[A]^o}$

$B \to {\text{Product ;}}\,\, - \frac{{d[B]}}{{dt}} = {k_2}{[B]}$

Units of $k_1$ and $k_2$ are expressed in terms of molarity $(M)$ and time $(sec^{-1})$ as