$\underset{3-Methyl-1-butene}{\mathop{\begin{matrix}
   {{H}_{3}}C-CH-CH=C{{H}_{2}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}}}\,\xrightarrow[(ii)\,Zn/{{H}_{2}}{{O}_{2}}]{(i)\,{{O}_{3}}}$ $\underset{2-Methylpro}{\mathop{\begin{matrix}
   {{H}_{3}}C-CH-CH=O  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3\,\,\,\,\,\,\,\,\,\,\,\,\,}}  \\
\end{matrix}}}\,+\underset{Formaldehyde}{\mathop{C{{H}_{2}}O}}\,$ 

$C_5H_{10}$ $\xrightarrow[(ii)\,Zn/{{H}_{2}}{{O}_{2}}]{(i)\,{{O}_{3}}}no\,reaction$

$\underset{2-Methyl-1-butene}{\mathop{\begin{matrix}
   {{H}_{3}}C-C{{H}_{2}}-C=C{{H}_{2}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}  \\
\end{matrix}}}\,\xrightarrow[(ii)\,Zn/{{H}_{2}}{{O}_{2}}]{(i)\,{{O}_{3}}}$

$\underset{Ethylmethylketone}{\mathop{\begin{matrix}
   {{H}_{3}}C-C{{H}_{2}}-C=O  \\
   |\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3\,\,\,\,\,\,\,\,}}  \\
\end{matrix}}}\,+\underset{Formaldehyde}{\mathop{C{{H}_{2}}O}}\,$

$\underset{2-Methyl-1-butene}{\mathop{\begin{matrix}
   {{H}_{3}}C-C=CH-C{{H}_{2}}  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}  \\
\end{matrix}}}\,\xrightarrow[(ii)\,Zn/{{H}_{2}}{{O}_{2}}]{(i)\,{{O}_{3}}}$ $\underset{Acetone}{\mathop{\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   {{H}_{3}}C-C  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{{H}_{3}}  \\
\end{matrix}}}\,+\underset{Acetaldehyde}{\mathop{C{{H}_{3}}CHO}}\,$