Which of the following is Baeyer's reagent?

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 $Z$?

Identify the reactions $X$,$Y$,and $Z$ respectively for the conversion of vinylcyclohexane as shown in the figure.

The reaction of propene with $HOCl$ proceeds via the addition of which of the following in the first step?

Isobutene in the presence of dilute $H_2SO_4$ forms an alcohol. The major product is

For the following reactions,the major products are shown: $H_2C=CH-CH=CH_2$ $\xrightarrow[0^\circ C]{HBr} CH_2=CH-CH(Br)-CH_3$ $\xrightarrow{25^\circ C} Br-CH_2-CH=CH-CH_3$. These provide an example of $1$ control at low temperature and $2$ control at higher temperature.