Which intermediate is formed when $HCl$ is added to propene in the presence of peroxide?

Which compound would give $3-$methyl$-6-$oxoheptanal upon ozonolysis?

The reaction of one mole of $3-$ethyl$-3-$methylpenta$-1, 4-$diene with $O_3$ and then with $Zn / H_2O$,gives

In the reaction $CH_2 = CH_2$ $\xrightarrow[\text{acid}]{\text{Hypochlorous}} M$ $\xrightarrow{R} \begin{array}{c} CH_2OH \\ | \\ CH_2OH \end{array}$,$M$ and $R$ are respectively:

An alkene $X$ $(C_4H_8)$ exhibits geometrical isomerism. Oxidation of $X$ with $KMnO_4 | H^+$ gives $Y$. On heating the sodium salt of $Y$ with a mixture of $NaOH$ and $CaO$,$Z$ is obtained. What is $Z$?

Ozonolysis of the given compound yields: