(i) $\mathop { - \mathop C\limits_|^| - \mathop C\limits^| = \mathop C\limits^| - \mathop C\limits_|^| - }\limits_{{\text{Trans - 2 butene (}}u = 0{\text{)}}} $
(iv) $\mathop {{C_2}{H_5}OH}\limits_{ + I} $
$(x)\begin{array}{*{20}{c}}
{O\,\,\,}\\
{||\,\,\,}\\
{C{H_3} - S - O - H}\\
{||\,\,\,\,}\\
{O\,\,\,\,}
\end{array}$
$\begin{array}{*{20}{c}}
{\,\,\,\,\,O}\\
{\,\,\,\,\,\,||}\\
{(y)\,\,\,C{H_3} - C - O - H}
\end{array}$
$(z)\,\, CH_3 -OH$